ASPRS-ACSM Convention Baltimore, Md., American Society for Photogrammetry and Remote Sensing, American Congress on Surveying and Mapping, ASPRS Meeting, & American Congress on Surveying and Mapping. (1991). Technical papers: 1991 ACSM-ASPRS Annual Convention : ACSM 51st Annual Convention : ASPRS 56th Annual Convention. American Society for Photogrammetry and Remote Sensing and American Congress on Surveying and Mapping.
Παραπομπή σε μορφή Chicago (17η εκδ.)ASPRS-ACSM Convention Baltimore, Md., American Society for Photogrammetry and Remote Sensing, American Congress on Surveying and Mapping, ASPRS Meeting, και American Congress on Surveying and Mapping. Technical Papers: 1991 ACSM-ASPRS Annual Convention : ACSM 51st Annual Convention : ASPRS 56th Annual Convention. Bethesda, MD: American Society for Photogrammetry and Remote Sensing and American Congress on Surveying and Mapping, 1991.
Παραπομπή σε μορφή MLA (9th εκδ.)ASPRS-ACSM Convention Baltimore, Md., et al. Technical Papers: 1991 ACSM-ASPRS Annual Convention : ACSM 51st Annual Convention : ASPRS 56th Annual Convention. American Society for Photogrammetry and Remote Sensing and American Congress on Surveying and Mapping, 1991.