The Index-Catalogue of Medical and Veterinary Zoology Card Files contain the original catalog cards compiled by the USDA Bureau of Animal Industry to record and organize references to literature on topics related to parasitology. These cards predate the publication of the Index-Catalogue of Medical and Veterinary Zoology, by Charles Wardell Stiles and Albert Hassall, published in USDA Bureau of Animal Industry Bulletin, no. 39., 1902-1912 (call number 1 An5B no. 39). The publication, Index-Catalogue of Medical and Veterinary Zoology: Authors, by Albert Hassall and Margie Potter, 1932, constitutes a revision and continuation of Bulletin 39 (call number 1 An5Ind).