共 12 条
[1]
BESKOW G, 1935, SWEDISH GEOLOGICAL C, V26, P222
[2]
Csathy T. I., 1962, HIGHW RES B, V331, P67
[3]
DECKER A. M., 1957, AGRON JOUR, V49, P412
[7]
JONES F. H., 1939, QUART JOUR FOREST, V33, P79