GF3: a general formatting system for geo-referenced data. Volume 3: standard subsets of GF3
(1996). GF3: a general formatting system for geo-referenced data. Volume 3: standard subsets of GF3. IOC Manuals and Guides, 17. UNESCO: Paris. ii, 68 pp.
Part of: IOC Manuals and Guides. Intergovernmental Oceanographic Commission: Paris. ISSN 0251-6020