Spurr, Josiah E books & textbook
Geology of the Aspen Mining District, Colorado
Paperback
isbn-10: 3337438814 / isbn-13: 9783337438814
Economic Geology of the Georgetown Quadrangle Colorado
Spurr, Josiah E Garrey, George H
Sylvanite Publishing /2015-02-26 Paperback / 546 Pages
isbn-10: 1614740208 / isbn-13: 9781614740209
