1876 , Emmons William H books & textbook
The principles of economic geology
Ulan Press /2012-08-31 Paperback / 634 Pages
Geology of petroleum
Ulan Press /2012-08-31 Paperback / 628 Pages
General Economic Geology, a Textbook
Hardpress Publishing /2013-01-28 Paperback / 546 Pages
isbn-10: 1313117544 / isbn-13: 9781313117548
