Geographical Surveys West of the 100th Meridian ('Wheeler Survey')
77.5 Records of Surveys and Survey Organizations 1834-1975.77.4.3 Records relating to field activities.77.4.2 Records of the Board of Engineers for the Improvement of Lake Harbors and Western Rivers.77.4 Records of the Topographical Bureau 1818-67.77.3.5 Records of other subordinate organizations.77.3.4 Records of the Historical Division.77.3.3 Records of the Office of the Director General of Military Railways.77.3.2 Records of the Special Service Division.77.3.1 Records of the Construction Division.77.3 Records of Subordinate Organizations of the Headquarters OFFICE 1871-1959.77.2.8 Records of engineer officers and other engineers.77.2.5 Other records relating to military functions.77.2.4 Correspondence relating to military functions, 1890-1955.77.2.3 Other records relating to civil functions.
