   The Ptarmigan's Dilemma an Ecological Exploration Into the Mysteries of Life (Paperback) ISBN-13: 9780771085185 ISBN-10: 0771085184 Genre: Science & Math ?  The Ptarmigan's Dilemma an Exploration Into How Life Organizes and Supports Itself (Hardcover) ISBN-13: 9780771085192 ISBN-10: 0771085192 Genre: Science & Math ?  Wolf Country Eleven Years Tracking the Algonquin Wolves (Hardcover) → Paperback ISBN-13: 9780771085628 ISBN-10: 0771085621 Genres: Science & Math, Outdoors & Nature ?  Wolf Country Eleven Years Tracking the Algonquin Wolves (Paperback) → Hardcover ISBN-13: 9780771085635 ISBN-10: 077108563X Genre: Science & Math ? |
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