The Colorado River Region And John Wesley Powell PECORA, W. T. (DIRECTOR, U.S. GEOLOGICAL SURVEY) First Edition. Pictorial Cloth. 145pp. Profusely illustrated, including numerous Geological Maps, Charts, Tables, and Statistical data. Geological Survey Professional Paper … $85.00
The Colorado River Region And John Wesley Powell PECORA, W. T. (DIRECTOR, U.S. GEOLOGICAL SURVEY) First edition. Pictorial cloth. 145 pp. Frontis. Foreword. Profusely illustrated with photographs, maps, diagrams, charts, tables. A collection of papers … $75.00
