Editore: Wyoming Geological Association, Casper, WY, 1970
Da: Prairie Creek Books LLC., Torrington, WY, U.S.A.
Prima edizione
Hardcover. Condizione: Very Good. No Jacket. Photographs, Charts, Maps (illustratore). 1st Edition. VG/none, used hc, 292pp plus plates in pocket at rear paste-down. Interior clean no marks except former owner's name on title page. Binding is tight.