(1968). Papers from the 28th Annual Meeting, American Congress on Surveying and Mapping: March 10-15, 1986. Washington, D.C.: The Congress.
Παραπομπή Chicago StylePapers From the 28th Annual Meeting, American Congress On Surveying and Mapping: March 10-15, 1986. Washington, D.C.: The Congress, 1968.
Παραπομπή MLAPapers From the 28th Annual Meeting, American Congress On Surveying and Mapping: March 10-15, 1986. Washington, D.C.: The Congress, 1968.
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