共 7 条
[1]
BUNGE W, 1962, THEORETICAL GEOGRA C
[2]
CURRY L, 1972, CAN GEOGR, V16, P1
[3]
Harary F., 1969, GRAPH THEORY, DOI DOI 10.21236/AD0705364
[4]
HUDSON JC, 1966, 1 U IOW DEP GEOGR PA
[6]
MUEHRCKE PC, 1973, P ASS AM GEOGR, V5, P190
[7]
Olson J., 1972, CANADIAN CARTOGRAPHE, V9, P122