共 4 条
[1]
BALLANTYNE A. K., 1963, CANADIAN JOUR SOIL SCI, V43, P52
[2]
BALLANTYNE A. K., 1963, CANADIAN JOUR SOIL SCI, V43, P359
[3]
PETERSEN FF, 1961, THESIS WASHINGTON ST
[4]
1965, REP NAT SOIL SURV CO