共 28 条
[2]
[Anonymous], DISCRIMINANT ANAL ST
[4]
Bryan H., 1979, CONFLICT GREAT OUTDO
[5]
BULTENA G, 1961, J FORESTRY MAR, P167
[6]
BURDGE R, 1979, IES5 RES REP
[7]
COCKRELL D, 1979, OCT LEIS RES S NAT R
[8]
COLVIN R, 1979, AUG ANN M RUR SOC SO
[9]
DEVALL B, 1976, LEISURE RECREATION P, P131