共 7 条
[1]
HOPP H., 1946, Journal of Soil and Water Conservation, V1, P85
[2]
HOPP HENRY, 1946, JOUR SOIL AND WATER CONSERV, V1, P11
[3]
MCCALLA T. M., 1946, Journal of Soil and Water Conservation, V1, P71
[6]
Vilensky D. G., 1945, AGRIC ENGINEERING, V26, P465
[7]
YODER ROBERT E., 1936, JOUR AMER SOC AGRON, V28, P337