vi, 99 pages : illustrations, maps ; 24 cm + 9 folded leaves in case
OCLC
ocm04146831, ocn885121852
Prepared in cooperation with the Geological Survey of Wyoming and the Dept. of Geology of the University of Wyoming as part of a program of the Dept. of the Interior for development of the Missouri River basin.
Includes bibliographical references (pages 91-96) and index.