共 12 条
[2]
BELL W. B., 1952, VIRGINIA JOUR SCI, V3, P169
[3]
BELL W. B., 1953, Veterinary Medicine, V48, P135
[4]
ENGEL RW, 1953, VA AGR EXPT STA TECH, P121
[5]
HANSEL W, 1953, CORNELL VET, V43, P311
[6]
HARSHFIELD GS, 1948, J AM VET MED ASSOC, V112, P446
[7]
HOEKSTRA WG, 1954, AM J VET RES, V15, P47
[8]
HOEKSTRA WG, UNPUBLISHED
[9]
OLAFSON P, 1947, CORNELL VET, V37, P279
[10]
REGAN W. M., 1936, Journal of Dairy Science, V19, P11, DOI 10.3168/jds.S0022-0302(36)93033-3