(1978). Proceedings of the American Congress on Surveying and Mapping, 38th Annual Meeting, Washington, D.C., February 26-March 4, 1978. Falls Church, VA: American Congress on Surveying and Mapping.
Παραπομπή Chicago StyleProceedings of the American Congress On Surveying and Mapping, 38th Annual Meeting, Washington, D.C., February 26-March 4, 1978. Falls Church, VA: American Congress on Surveying and Mapping, 1978.
Παραπομπή MLAProceedings of the American Congress On Surveying and Mapping, 38th Annual Meeting, Washington, D.C., February 26-March 4, 1978. Falls Church, VA: American Congress on Surveying and Mapping, 1978.
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