共 28 条
[1]
Ackoff R. L., 1972, PURPOSEFUL SYSTEMS
[2]
Andersen K. E., 1971, PERSUASION THEORY PR
[3]
APPLBAUM RL, 1974, STRATEGIES PERSUASIV
[4]
BADGER TJ, 1975, THESIS COLORADO STAT
[5]
BURY RL, 1980, J SOIL WATER CONSERV, V35, P90
[6]
Campbell D. T., 1972, EXPT QUASIEXPERIMENT
[7]
CANON LK, 1979, USDA NE276 FOR SERV
[8]
CLARK RN, 1977, P RIVER RECREATION M, P91
[9]
COLE DN, 1979, RECREATIONAL IMPACT
[10]
FAZIO JR, 1974, THESIS COLORADO STAT