TY  - GEN
AU  - United Nations Environment Programme
PY  - 1987
UR  - https://wedocs.unep.org/handle/20.500.11822/29890
LA  - English
KW  - geographic information system
TI  - Guidelines for the Development of GRID-Compatible National Geographic Information Systems (GIS): GRID Information Series No. 13
M3  - Communication or other resource
ER  -