  2007 - Ecological Understanding Second Edition the Nature of Theory and the Theory of Nature (Hardcover) ISBN-13: 9780125545228 ISBN-10: 0125545223 Genres: Reference, Science & Math ?  1994 - Ecological Understanding [The Nature of Theory and the Theory of Nature] (Hardcover) ISBN-13: 9780125547208 ISBN-10: 012554720X Genres: Science & Math, Engineering & Transportation, Substores ? |
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