The Warsaw Jewish merchants' association annual reports, 1874-1930,
that Nicole Berline mentioned recently are now searchable on
http://genealogyindexer.org. They are included if you search with the
default options, or if you change the "Any Place" dropdown to "Warsaw"
or "Poland." The reports include lists of members, and the earliest
and latest appearances of members might provide clues to estimate
dates of birth or death in some cases. (Note that only 30 of the
years 1874-1930 are currently available; if I find more, I will add
them.)

All search results link directly to scans of the annual reports. To
view the images, you will need to have a DjVu plugin installed for
your web browser (I use the plugin from
http://www.caminova.net/en/downloads/download.aspx?id=1).

Best regards,

Logan Kleinwaks
kleinwaks@alumni.princeton.edu
near Washington, D.C.