1972 - Alternatives to the Internal Combustion Engine Impacts on Environmental Quality [RFF Press] (Hardcover) ISBN-13: 9780801813696 ISBN-10: 0801813697 Genres: Nonfiction, Science & Math, Medicine, Engineering & Transportation ? 1971 - Economics and the Environment a Materials Balance Approach [RFF Press] (Paperback) ISBN-13: 9780801812156 ISBN-10: 0801812151 ? |