Supersedes Special publication no. 120, "Manual of first-order triangulation" [first published in 1926] and the triangulation portion of Special publi...
Supersedes Special publication no. 120, "Manual of first-order triangulation" [first published in 1926] and the triangulation portion of Special publication no. 145, "Manual of second- and third-order triangulation and traverse" [first published in 1929; by the U.S. Coast and Geodetic Survey]