TY  - BOOK
AU  - Petersen,William Earl
TI  - Dairy science,: its principles and practice
AV  - SF239 .P43 1950
U1  - 637 
PY  - 1950///]
CY  - Philadelphia
PB  - Lippincott
KW  - Dairying
KW  - Dairy cattle
N1  - "Reference readings": p. 676-686
ER  -