共 19 条
[1]
DONALD H. P., 1938, Empire Journal of Experimental Agriculture, V6, P341
[3]
FENSKE TH, 1939, THESIS U MINN
[4]
FISHER RA, 1938, STATISTICAL METHODS
[5]
HANKINS OG, 1940, P AM SOC ANIM PROD, V33, P284
[6]
HETZER HO, 1940, AM SOC ANIMAL PROD P, P135
[7]
HETZER HO, 1940, USDA570 CIRC
[8]
HOGAN AG, 1927, MO AGR EXP STA B, V256, P46
[9]
JOHANSSON I, 1929, Z TIERZ ZUCHTUNGSBIO, V15, P49
[10]
KRIZENECKY J, 1935, CESKOSLAV AKAD ZEMED, V10, P140