Standard GF3 Subset for Digitized Contour Maps (Marine Geophysical Data)
IOC/UNESCO (1985). Standard GF3 Subset for Digitized Contour Maps (Marine Geophysical Data). Annex Report GF3, Standard Format. UNESCO: Paris. 8 pp.
Deel van: IOC/UNESCO Annex Report GF3, Standard Format. UNESCO. , meer
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