共 13 条
[1]
ANDERSSON A, 1967, Grundforbattring, V20, P95
[2]
Black C.A., 1965, METHODS SOIL ANAL
[6]
JONASSON IR, 1972, CAN MIN METALL BULL, V65, P32
[7]
JONASSON IR, 1970, GEOL SURV CAN PAP, P70
[8]
POELSTRA P, 1973, Netherlands Journal of Agricultural Science, V21, P77
[10]
ROBBINS JC, 1973, GEOCHEMICAL EXPLORAT, P315