共 61 条
[1]
BALL WE, 1935, CALIF AGR EXP STA B, V596, P1
[3]
BOLLEY HL, 1908, ND AGR EXP STA B, V80, P541
[4]
BOLLEY HL, 1901, N DAK AGR EXPT STA A, V11, P48
[5]
BONDE R, 1945, ME AGR EXP STA B, V438, P535
[6]
BUCKHOLTZ KP, 1945, U WIS MIMEO
[7]
CHAPMAN ID, 1945, LA CONSERVATIONIST, V3, P7
[9]
CRAFTS AS, 1944, CALIF AGR COLL MIMEO
[10]
CRAFTS AS, 1944, WEST GROWER SHI 0819