共 16 条
- [1] BAUM EL, 1957, ECONOMIC TECHNICA ED
- [2] BAUM EL, 1957, ECONOMIC TECHNICAL A
- [3] DOLL JP, 1958, 463 IOW STAT COLL RE
- [4] GRAHAM ER, 1959, 734 U MISS AGR EXP S
- [5] HEADY EO, 1966, IOWA STAT U AGR EXP
- [6] HEADY EO, 1961, AGRICULTURAL PRODUCT
- [7] KROTH EM, 1962, 13 MISS AGR EXP STA
- [8] KROTH EM, 1966, 67 MISS AGR EXP STA
- [9] KROTH EM, 1967, 76 MISS AGR EXP STA
- [10] KROTH EM, 1963, 27 MISS AGR EXP STA