(1976). Proceedings of the American Congress on Surveying and Mapping, Fall Convention, Seattle, Washington, September 28-October 1, 1976. Falls Church, VA: American Congress on Surveying and Mapping.
Παραπομπή Chicago StyleProceedings of the American Congress On Surveying and Mapping, Fall Convention, Seattle, Washington, September 28-October 1, 1976. Falls Church, VA: American Congress on Surveying and Mapping, 1976.
Παραπομπή MLAProceedings of the American Congress On Surveying and Mapping, Fall Convention, Seattle, Washington, September 28-October 1, 1976. Falls Church, VA: American Congress on Surveying and Mapping, 1976.
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