Mining and mineral operations in the North-Central States :
a visitor guide /
by Bureau of Mines State liaison officers.

APA Citation

United States. Bureau of Mines. (1977). Mining and mineral operations in the North-Central States: a visitor guide. Washington: The Bureau : for sale by the Supt. of Docs., U.S. Govt. Print. Off..

MLA Citation

United States. Bureau of Mines. Mining And Mineral Operations In the North-Central States: a Visitor Guide. Washington: The Bureau : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977.

Warning: These citations may not always be complete (especially for serials).