1. Manual of first-order leveling;Avers;United States Coast and Geodetic Survey special publication,1939
2. A computer for solving linear simultaneous equations;Berry;J. App. Phys.,1946
3. Topographic instructions of the United States Geological Survey;Birdseye;Geological Survey Bull.,1928
4. Surveying;Breed,1938
5. The adjustment of misclosures;Cowles;Geophys.,1938