共 6 条
[1]
BARBER SA, 1961, 123 NORTH CENT REG P
[2]
GARBER SA, 1961, 717 PURD AGR EXP STA
[3]
HANWAY JJ, 1963, BETTER CROPS PLANT F, V47, P33
[4]
HANWAY JJ, 1966, 544 IOW AGR EXP STA
[5]
LUEBS R. E., 1956, Soil Science Society of America. Proceedings, V20, P45