共 38 条
[21]
MOYLE JB, 1956, WILD MAN, V20, P302
[22]
PUTNAM HD, 1958, PRELIMINARY INVESTIG
[25]
RUSSELL EW, 1963, SOIL CONDITIONS PLAN
[26]
SAWYER CN, 1952, SEWAGE IND WASTES, V24, P768
[27]
SCARSETH GEORGE D., 1938, JOUR AMER SOC AGRON, V30, P361
[29]
TAYLOR AW, 1967, J SOIL WATER CONSERV, V22, P228
[30]
TIMMONS D R, 1968, Minnesota Science, V24, P16