20050919184600.0 Veterinary extension quarterly Veterinary extension quarterly. Veterinary extension quarterly. Veterinary extension quarterly 0097-6989 0097-6989 0097-6989 0097-6989 hathi HathiTrust https://catalog.hathitrust.org/Record/009882943 1925/1925 2024-03-01 no.18 (1925) no.18 (1925) Preserved University of Pennsylvania. Veterinary extension quarterly. 0097-6989 0097-6989 Pennsylvania