The road material resources of Minnesota
By: by George W. Cooley
Contributors: United States. Bureau of Public Roads
Series: Bulletin / U.S. Department of Agriculture, Office of Public Roads -- no. 40; Bulletin (United States. Office of Public Roads) -- no. 40.
Publisher: U.S. Dept. of Agriculture, Office of Public Roads; G.P.O.
Published: 1911
Place of publication: Washington
Language: eng
Number of pages: 24
Subjects: Road materials
Notes: "Issued December 16, 1911."