VI  ALBERT E. SCHRECK,editor-In-Chief 
Nebraska: Nebraska Geological Survey; and Oil and Gas Conservation Commission.

Nevada: Nevada Bureau of Mines. 
New Hampshire: New Hampshire Department of Resources and Economic Development.

New Jersey: New Jersey Division of Resource Development, Bureau ' of Geology
and Topography. 
New Mexico: Oil and Gas Conservation Commission. 
New York: Geological Survey—New York State Museum and Science Service.

North Carolina: Geological Survey of North Carolina. 
North Dakota: State Geological Survey of North Dakota. 
 
Oklahoma: Oklahoma Geological Survey; Oil and Gas Conservation Department,
Oklahoma Corporation Commission; and Gross Production Division, Oklahoma
Tax Commission. 
Oregon: Oregon Department of Geology and Mineral Industries. 
 
Pennsylvania: Pennsylvania Bureau of Topographic and Geologic Survey. Puerto
Rico: Mineralogy, and Geology Section, Industrial Research, Economic Development
Administration, Commonwealth of Puerto Rico. 
 
South Carolina: South Carolina Division of Geology, State Development Board.

South Dakota: South Dakota State Geological Survey. 
 
Tennessee: Tennessee Division of Geology, Department of Conservation. 
Texas: Bureau of Economic Geology, The University of Texas, Oil and Gas Division,
Railroad Commission of Texas; Oil and Gas Division, State Comptroller of
Public Accounts. 
Utah: Utah Geological and Mineralogical Survey; and Oil and Gas Conservation
Commission. 
 
Virginia: Virginia Division of Mineral Resources. 
 
Washington: Washington Division of Mines and Geology, Department of Conservation
and Development. 
West Virginia: West Virginia Geological and Economic Survey. 
Wisconsin: Wisconsin Geological Survey. 
Wyoming: Geological Survey of Wyoming; and Oil and Gas Conservation Commission.

 
 Except for the statistical summary and employment and injuries chapters,

this volume was prepared by the staffs of the following Bureau of Mines 
Mineral Resource Offices under the direction of: Mark L. Wright, Albany,

Oreg.; Floyd D. Everrett, Bartlesville, Okla.; Murphy E. Hawkins, Dallas,

Tex.; Ottey M. Bishop, Denver, Cob.; Robert L. Thorne, Juneau, Alaska; 
Robert D. Thomson, Knoxville, Tenn.; Wesley Grosh, Twin Cities, Minn.; 
Joel Van Sant, Pittsburgh, Pa.; Donald R. Irving, San Francisco, Calif.;

Richard Appling, Spokane, Wash. 
 The manuscripts upon which this volume was based were reviewed by the Minerals
Yearbook staff under the direction of Kathleen J. D'Amico to insure statistical
consistency among the tables, figures, and text between this volume and Volume
I—IT, and between this volume and those for former years. 
 Minerals Yearbook compilations are based largely on facts provided by the
mineral industries. Acknowledgment is made of the willing contribution by
both companies and individuals of these essential data.