共 18 条
[1]
ANDERBERG MR, 1973, CLUSTER ANAL APPLICA
[2]
BASSETT JR, 1972, USER STUDY CHARACTER
[3]
BURCH WR, 1964, NEW LOOK OLD FRIEND
[4]
CLARK RN, 1978, RIVER RECREATION MAN, P91
[5]
CRANDALL R, 1977, OCT NAT RECR PARKS A
[6]
Driver B., 1978, INTEGRATED INVENTORI, P24
[7]
DRIVER BL, UNPUBLISHED
[8]
GRAEFE AR, 1977, THESIS TEXAS AM U
[9]
Hendee J. C., 1968, WILDERNESS USERS PAC
[10]
HENDEE JC, 1968, DNW61 USDA FOR SERV