共 8 条
[1]
JOFFE A., 1958, S AFRICAN JOUR AGRIC SCI, V1, P435
[2]
MADSEN GC, 1947, CAV VAR KLONDIKE BOT, V109, P120
[3]
Nielsen CS, 1942, BOT GAZ, V104, P99, DOI 10.1086/335110
[4]
NJOKU E., 1958, JOUR WEST AFRICAN SCI ASSOC, V4, P99
[6]
ROBERTS RH, 1963, 123 COLL INT CENT NA, P611
[7]
Salisbury F. B., 1963, FLOWERING PROCESS
[8]
WIENK JF, 1963, WALP MEDED LANDBOUWH, V63, P1