共 11 条
[1]
AINSLIE HR, 1977, EVALUATION COOPERATI
[2]
ARAJI AA, 1981, U IDAHO RES B, V117
[3]
CROYLE GE, 1976, PENNSYLVANIA STATE U, V62
[4]
HARDIE A R, 1985, Journal of Dairy Science, V68, P244
[5]
ECONOMIC VALUE OF DAIRY-HERD IMPROVEMENT PROGRAMS
[J].
JOURNAL OF DAIRY SCIENCE,
1974, 57 (11)
:1420-1422
[6]
MCCAFFREE JD, 1974, SEARCH, V4
[7]
MEADOWS CE, 1976, COOP EXT SER AGR TRA, V113