GF3: a general formatting system for geo-referenced data. Volume 4: user guide to the GF3-PROC software
(1989). GF3: a general formatting system for geo-referenced data. Volume 4: user guide to the GF3-PROC software. IOC Manuals and Guides, 17. UNESCO: Paris. iv, 23 pp.
Part of: IOC Manuals and Guides. Intergovernmental Oceanographic Commission: Paris. ISSN 0251-6020, more
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