共 13 条
[1]
ALBERTSON F. W., 1937, Ecological Monographs, V7, P483, DOI 10.2307/1943101
[2]
Clements F. E., 1924, CARNEGIE I WASH PUBL
[3]
CLEMENTS FE, 1936, CARNEGIE I WASH S PU, V24
[4]
HARVEY A. D., 1936, Journal of the American Society of Agronomy, V28, P767
[5]
NEWPORT F. C., 1937, Soil Conservation, V2, P139
[6]
Savage D.A., 1939, 491 USDA
[7]
SAVAGE DA, 1935, USDA TECH B, V549
[8]
SAVAGE DA, 1937, 4TH INT GRASSL C AB, P178
[9]
WATSON SH, 1939, SOIL CONSERV, V5, P57