TY  - BOOK
AU  - Roberts, Stephen J
TI  - Veterinary obstetrics and genital diseases (Theriogenology)
U1  - 636.0898 R6 
PY  - 1986///
CY  - New York
PB  - The author
KW  - Obstetricia veterinaria
KW  - Reproducción animal I. t
ER  -