Conceptual framework and guidelines for establishing geogprahic information systems : capable of integrating natural resources data and socio-economic data for development-oriented planning, monitoring and research (preliminary version) / ed. by W.H Erik de Man ; General Information Programm and UNISIST
. - Paris : Unesco, 1984
. - vi, 67 p. 30 cm
. - (; PGI-84/WS/20)
C.S6.07.11.4/Cx221
