American Congress on Surveying and Mapping. Surveying and mapping. The Congress.
Παραπομπή σε μορφή Chicago (17η εκδ.)American Congress on Surveying and Mapping. Surveying and Mapping. Washington, DC: The Congress.
Παραπομπή σε μορφή MLA (8th εκδ.)American Congress on Surveying and Mapping. Surveying and Mapping. The Congress.
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