共 21 条
[2]
Barher GW, 1926, J AGRIC RES, V32, P1053
[3]
BARTLEY HN, 1931, USDA197 CIRC
[5]
Caffrey DJ, 1927, USDA DEP B, V1476
[7]
Feeny P., 1975, COEVOLUTION ANIMALS, P3, DOI DOI 10.1111/J.1472-4642.2007.00422.X
[8]
HODGESON BE, 1928, USDA TECH B, V77
[10]
JONES DW, 1939, VA TRUCK EXP STN B, V102, P1621