1. Bench marks. Descriptions of bench marks, reprinted from Precise leveling in United States, 1903-07, with readjustment of level net and resulting elevations; by John F. Hayford and L. Pike. Bookmark Corporate/Agency Authors: Coast and Geodetic Survey and Agriculture Department Publisher: Coast and Geodetic Survey Date: 1934 SuDoc number: C 4.2/a:B 431