共 13 条
[2]
FISHER NM, 1972, THESIS U LONDON
[3]
FISHER NM, 1972, EXPTL HORTICULTURE, V24, P83
[4]
IVINS J. D., 1965, Outlook on Agriculture, V4, P211
[6]
NIEUWHOF M, 1969, COLE CROPS
[8]
SANDWELL I, 1969, REPORT STOCKBRIDGE H, P20
[10]
STOKES PEARL, 1951, MEDEDEL LANDBOUWHOGESCH WAGENINGEN, V50, P141