International boundary study
U. S. Bureau of Intelligence and Research. Office of the Geographer
U.S. Dept. of State, issued by the Geographer 1961 International boundary study no. 1
所蔵館1館
U. S. Bureau of Intelligence and Research. Office of the Geographer [19--?] International boundary study no. 158
U. S. Bureau of Intelligence and Research. Office of the Geographer [19--?] International boundary study no. 156