共 16 条
[11]
*IT 86 COMM, 1986, INF TECHN PLAN CONC
[12]
Masser I., 1988, International Journal of Geographical Information Systems, V2, P11, DOI 10.1080/02693798808927875
[14]
*UK DEP ENV, 1988, HANDL GEOGR INF GOV
[15]
*UK DEP TRAD IND, 1986, GOV HELD TRAD INF GU
[16]
Webster C., 1988, International Journal of Geographical Information Systems, V2, P67, DOI 10.1080/02693798808927880