Primary bench marks in Minnesota.
By: Prepared under the direction of the hydrologist of the Division of water resources and engineering of the Department of conservation.
Contributors: Minnesota. Division of Water Resources and Engineering.
Published: 1942
Place of publication: [St. Paul]
Language: eng
Subjects: Bench-marks -- Minnesota.; Minnesota -- Altitudes
Notes: Includes bibliography.
At head of title: State of Minnesota, Dept. of conservation, Division of water resources & engineering, Walter S. Olson, director.
Various pagings; reproduced from type-written copy.