共 24 条
- [1] BARNETT HG, 1953, INNOVATION
- [2] COPP JH, 1956, 83 KANS AGR EXPT STA
- [3] ERASMUS CJ, 1961, MAN TAKES CONTROL CU, P17
- [4] FLIEGEL, IN PRESS
- [5] FLIEGEL, 1956, RURAL SOCIOLOGY, V21, P284
- [6] FLIEGEL, 1956, RURAL SOCIOLOGY, V21, P292
- [7] FLIEGEL FC, 1965, RURAL SOCIOL, V30, P278
- [10] Kivlin J.E., 1960, THESIS PENNSYLVANIA