共 11 条
[1]
CAMBURN OM, 1942, VERMONT AGR EXPT STA, V494
[2]
HAYDEN CC, 1945, OHIO AGR EXPT STA B, V656
[3]
MONROE C. F., 1939, JOUR DAIRY SCI, V22, P37, DOI 10.3168/jds.S0022-0302(39)92848-1
[5]
Perkins A. E., 1943, JOUR DAIRY SCI, V26, P545, DOI 10.3168/jds.S0022-0302(43)92751-1
[6]
PERKINS AE, 1945, OHIO AGR EXPT STA BI, V234, P108
[7]
PERKINS AE, 1941, OHIO AGR EXPT STA BI, V208, P6
[8]
SHEPHERD JB, 1941, USDA603 CIRC
[9]
TAYLOR MW, 1941, NEW JERSEY AGR EXPT, V683
[10]
Virtanen AI, 1938, CATTLE FODDER HUMAN