共 4 条
[1]
ALLARD HA, 1944, USDA867 TECH B, P1
[2]
ALLARD R. W., 1956, HILGARDIA, V24, P235
[3]
COYNE DP, 1966, P AM SOC HORTIC SCI, V89, P351
[4]
RUDORF W, 1958, 10 P INT C GEN MONTR, V2, P243