GF3: a general formatting system for geo-referenced data. Volume 6: quick reference sheets for GF3 and GF3-PROC
(1989). GF3: a general formatting system for geo-referenced data. Volume 6: quick reference sheets for GF3 and GF3-PROC. IOC Manuals and Guides, 17. UNESCO: Paris. iii, 22 pp.
Part of: IOC Manuals and Guides. Intergovernmental Oceanographic Commission: Paris. ISSN 0251-6020