TY - RPRT TI - Triangulation and primary traverse, 1916-1918. Triangulation and primary traverse in Texas, 1919-1920 AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1923 DO - 10.3133/b709q UR - https://pubs.usgs.gov/publication/b709Q ID - b709Q ER -