Clay materials of the United States
By: by Robert T. Hill
Contributors: Geological Survey (U.S.)
Publisher: Government Printing Office
Published: 1893
Place of publication: Washington
Language: eng
Number of pages: 528
Subjects: Clay
Notes: At head of title: Department of the Interior. United States Geological Survey.

"Abstract from 'Mineral resources of the United States, calendar year 1891'--Division of Mining Statistics and Technology."

Includes bibliographical references.