共 41 条
[4]
Bek F., 1974, Atomic Absorption Newsletter, V13, P47
[5]
BLAXTER KL, 1959, SCIENTIFIC PRINCIPLE, P21
[6]
BROSTER W H, 1974, Proceedings of the British Society of Animal Production, V3, P59
[7]
BROSTER WH, 1972, HDB TIERERNAHRUNG, V2, P292
[8]
CLAESSON O., 1956, Acta Agriculturae Scandinavica, V6, P383
[9]
DRORI D, 1973, ISRAELI SWEDISH SEMI