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Copyright 1941-1942/Memoir Bulletin No. 4/January 1942/Michigan State College, Agricultural Experiment Station, East Lansing/"An illustrated booklet depicting the nature and magnitude of One Phase of Michigan's Gigantic Lumbering Industry. Functions of Log marks and Methods of Use Together with a Description of the Operation of Boom Companies During the Height of the Pine Harvest."
Completed by Workers of the Writters Program of the Work Projects Administration in the State of Michigan
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