1999 - Principles of Environmental Economics Economics Ecology and Public Policy (Paperback) ISBN-13: 9780415195713 ISBN-10: 0415195713 Genres: Business & Money, Nonfiction, Science & Math ? 1999 - Principles of Environmental and Natural Resource Economics (Other) ISBN-13: 9780415195706 ISBN-10: 0415195705 Genres: Business & Money, Nonfiction, Science & Math ? |