  2008 - Chasing Spring an American Journey Through a Changing Season (Paperback) → Hardcover ISBN-13: 9780743262484 ISBN-10: 0743262484 Genres: Science & Math, Outdoors & Nature ?  2006 - Theories for Everything an Illustrated History of Science (Hardcover) ISBN-13: 9780792239123 ISBN-10: 0792239121 Genre: Science & Math ?  2006 - Chasing Spring an American Journey Through a Changing Season (Hardcover) → Paperback ISBN-13: 9780743262477 ISBN-10: 0743262476 Genres: Science & Math, Engineering & Transportation, Outdoors & Nature 3  1998 - Natural Lives Modern Times People and Places of the Delaware River [Pennsylvania Paperbacks] (Paperback) ISBN-13: 9780812216585 ISBN-10: 081221658X Genres: History, Travel, Science & Math, Engineering & Transportation, Outdoors & Nature ?  1992 - Natural Lives Modern Times People and Places of the Delaware River (Hardcover) ISBN-13: 9780517582251 ISBN-10: 0517582252 Genres: History, Outdoors & Nature ? |
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