共 20 条
- [1] AXELSSON J, 1953, LANDBRUKS HOGSKOLL A, V19, P145
- [2] BAUMGARDT BR, 1962, 10 WISC AGR EXPT STA
- [3] CHRISMAN J, 1968, 10 P TECH ALF C REN, P37
- [4] CHRISMAN J, 1963, 8 P TECH ALF C, P44
- [5] CHRISMAN J, 1965, 9 TECH ALF C, P17
- [6] CHRISTENSEN RE, 1968, J ASSOC OFF ANA CHEM, V51, P1003
- [8] KNOOP JG, 1967, FARM QUARTERLY, V22, P52
- [9] MARTEN GC, 1970, 11TH P INT GRASSL C, P506
- [10] OGDEN RL, 1965, 9 P TECH ALF C, P36