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|All Authors / Contributors:||U.S. Lake Survey.|
|Notes:||Page 37 numbered as leaf.
Double chart on versos of pages 26 and 27.
"Primarily the United States Lake survey is concerned with gathering the data for and publishing navigation maps and bulletins of the Great lakes, their connecting waters, the New York canals, lake Champlain; and with the scientific study of all matters affecting the hydraulics and hydrology of the Great lakes and their watershed. This pamphlet outlines the work of the Lake survey, gives a brief account of its history and illustrates its method and products."
|Description:||1 preliminary leaf, 53 pages including illustrations, tables folded map, charts (1 double) folded diagram 27 cm|
|Responsibility:||Published by the United States Lake survey, Detroit, Michigan, April, 1939. Corps of engineers, United States army.|