Here you go. I have culled out a few of the most pertinent statements to answer questions here about evidence for the existence and size of the Holocaust but it would be best to read the whole article. Here is the link: http://www.jewishvirtuallibrary.org/jsource/Holocaust/denial.html
The History Department at Duke University, responding to a CODOH ad, unanimously adopted and published a statement noting: "That historians are constantly engaged in historical revision is certainly correct; however, what historians do is very different from this advertisement. Historical revision of major events. . . is not concerned with the actuality of these events; rather, it concerns their historical interpretation - their causes and consequences generally. There is no debate among historians about the actuality of the Holocaust... there can be no doubt that the Nazi state systematically put to death millions of Jews, Gypsies, political radicals and other people."
Perhaps most significantly, in December 1991, the governing council of the American Historical Association (AHA), the nation's largest and oldest professional organization for historians, unanimously approved a statement condemning the Holocaust-denial movement, stating, "No serious historian questions that the Holocaust took place." The council's action came in response to a petition circulated among members calling for an official statement against Holocaust-denial propaganda; the petition had been signed by more than 300 members attending the organization's annual conference. Moreover, in 1994, the AHA reaffirmed its position in a press release which stated that "the Association will not provide a forum for views that are, at best, a form of academic fraud."
Another frequent claim of Holocaust "revisionists" concerns what they describe as the lack of objective documentation proving the facts of the Holocaust, and the reliance by scholars on biased and poorly collected testimonies of survivors. However, the Germans themselves left no shortage of documentation and testimony to these events, and no serious scholar has relied solely on survivor testimony as the conclusive word on Holocaust history. Lucy Dawidowicz, in the preface to her authoritative work, The War Against the Jews 1933-1945, wrote, "The German documents captured by the Allied armies at the war's end have provided an incomparable historical record, which, with regard to volume and accessibility, has been unique in the annals of scholarship.... The National Archives and the American Historical Association jointly have published 67 volumes of Guides to German Records Microfilmed at Alexandria, VA. For my work I have limited myself mainly to published German documents."26 The author then proceeds to list 303 published sources - excluding periodicals -documenting the conclusions of her research. Among these sources are the writings of recognizable Nazi policy makers such as Adolf Hitler, Heinrich Himmler, Rudolf Hoess and Alfred Rosenberg.
Similarly, Raul Hilberg in his three-volume edition of The Destruction of the European Jews, wrote, "Between 1933 and 1945 the public offices and corporate entities of Nazi Germany generated a large volume of correspondence. Some of these documents were destroyed in Allied bombings, and many more were systematically burned in the course of retreats or in anticipation of surrender. Nevertheless, the accumulated paper work of the German bureaucracy was vast enough to survive in significant quantities, and even sensitive folders remained."26
It is thus largely from these primary sources that the history of the Holocaust has been compiled. A new factor in this process is the sudden availability of countless records from the former Soviet Union, many of which had been overlooked or suppressed since their capture at war's end by the Red Army. Needless to say, the modification of specific details in this history is certain to continue for a number of years to come, considering the vastness and complexity of the events which comprise the Holocaust. However, it is equally certain that these modifications will only confirm the Holocaust's enormity, rather than - as the "revisionists" would -call it into question.
Another frequent "revisionist" assertion calls into question the generally accepted estimates of Jewish victims of the Holocaust. In attempting to portray the deaths of millions of Jews as an exaggeration or a fabrication, Holocaust deniers wildly manipulate reference works, almanac statistics, geopolitical data, bedrock historical facts and other sources of information and reportage.
For example, "revisionists" commonly cite various almanac or atlas figures - typically compiled before comprehensive accounts on the Holocaust were available - that appear to indicate that the worldwide Jewish population before and after World War II remained essentially stable, thereby "proving" that 6 million Jews could not have died during this period.
The widely cited "6 million" figure is derived from the initial 1945 Nuremberg trial estimate of 5.7 million deaths; subsequent censuses, statistical analyses, and other demographic studies of European Jewry have consistently demonstrated the essential accuracy of this first tally.27 After nearly 50 years of study, historians agree that approximately 6 million Jews perished during the course of the Nazi genocide.28
In The War Against the Jews, Lucy Dawidowicz offers a country-by-country accounting of Jewish deaths.29