The U.S. Library of Congress is your friend:

http://memory.loc.gov/service/pnp/gg...400/02434v.jpg
http://memory.loc.gov/service/pnp/npcc/09300/09338v.jpg
http://memory.loc.gov/service/pnp/gg...400/02427v.jpg
http://memory.loc.gov/master/pnp/cph...0/3b09920u.tif

Their interface is crude, but if you choose suitable search terms you can turn up a lot of info in a short time. This is what you get if you search on "auto race":

http://lcweb2.loc.gov/cgi-bin/query/...temp/~pp_mjoH: