If you go over to and join this little list http://tech.groups.yahoo.com/group/sussex_breeders/ ...check the Database section .
I put a 63 book bibliography of on-line poultry lit there with links to the on-line lit.
If you don't find what you need there, check Google Books and use Advanced Search
http://books.google.com/advanced_book_search to keyword search for your specialty or HathiTrust Digital Library
http://www.hathitrust.org/ and do the same. Much obscure and valuable lit of specific topics in these places.
Making such databases is a pleasure of mine. Some people do crossword puzzles, I like to make no-discussion databases
for research purposes. I also made one for canines called Book Work and Breed History (BWBH) :
P.S., Here's an interesting article: http://www.oclc.org/us/en/news/releases/2011/20114.htm
Bellwether Collies (retired)
western PA, USA