共 10 条
[1]
[Anonymous], 1968, MANAGING WATER QUALI
[2]
BAXTER SS, 1967, NATIONAL S QUALITY S, P179
[3]
BONDURANT DT, 1971, IOWA ACADEMY SCIENCE, V77, P55
[4]
JOHNSON HP, 1970, AGRICULTURAL PRACTIC, P3
[6]
TIMMONS JF, 1973, ECONOMICS DECISION M
[7]
*US SEN SEL COMM N, 1960, WAT RES ACT US POLL
[8]
WANIELISTA MP, 1971, THESIS CORNELL U
[9]
WISCHMEIER WH, 1965, USDA282 AGR HDB
[10]
[No title captured]