The elements of geology, for popular use : containing a description of the geological formations and mineral resources of the United States Q Science
An introduction to geology : intended to convey a practical knowledge of the science, and comprising the most important recent discoveries, with explanations of the facts and phenomena which serve to confirm or invalidate various geological theories Q Science
Earth tones– : the book : federal science for sustainable development Earth tones– the book : federal science for sustainable development Q Science
