A list of towns for which yizkor books have been published is in Appendix A. Consult the book to see if there is mention of the individuals or family names you are researching. Check the records of the International Tracing Service for information about survivors and victims, either by writing to them using the Foreign Inquiry Location Service of the American Red Cross or by consulting the microfilm copy at Yad Vashem in person. Where applicable, consult lists that exist for Belgium, France, Germany, Holland, Hungary and other areas. Contact a local Holocaust Resource Center for information about the latest resources found for Holocaust research. If the local facility does not have a book or record known to be available elsewhere, ask them to secure a copy of the information for their permanent collection or as a loan copy.
New acquisitions are constantly being made and resource sites regularly share their information.
Consider asking for help from a Jewish genealogical society. Their members are researching their families' histories. Because the Holocaust has had such a profound affect on contemporary Jewish families, members have developed expertise in Holocaust research. If you have the option of either going to or writing to a major resource center, go there in person. Many research sites are very conscientious about processing mail inquiries, but the recipient of your request can devote only a limited amount of time to your inquiry.