共 35 条
[2]
BECKER RH, 1981, J ENVIRON MANAGE, V13, P259
[3]
Brunswik E., 1956, PERCEPTION REPRESENT
[5]
CHURCH F, 1977, WILDERNESS BALANCED
[6]
CLARK RN, 1976, BACKCOUNTRY MANAGEME, P2
[7]
COLE DN, 1990, J SOIL WATER CONSERV, V45, P360
[8]
Dillman DA, 1978, MAIL TELEPHONE SURVE
[9]
HAAS GE, 1987, J FOREST, V85, P17