THE SMITHSONIAN INSTITUTION'S STUDY OF NATURAL RESOURCES APPLIED TO PENNSYLVANIA'S RESOURCES, BASED ON LATEST GOVERNMENTAL DATA
Washington, DC: Smithsonian Institution, 1924. Third printing. Hardcover. The book is divided into three parts: Part 1, Pennsylvania's Natural Resources (Coal, Peat, Coke, Oil, Gas, Electric Power, Water, Forests, Iron, Glass, etc.); Part 2, Pennsylvania's Agricultural and Human Resources; Part 3, Transporation as a Factor in Resource Development (Waterways, Steam..... More