  Patterns of Discovery an Inquiry Into the Conceptual Foundations of Science (Hardcover) → Paperback ISBN-13: 9780521051972 ISBN-10: 0521051975 Genre: Nonfiction ?  Patterns of Discovery an Inquiry Into the Conceptual Foundations of Science (Paperback) → Hardcover ISBN-13: 9780521092616 ISBN-10: 0521092612 Genre: Nonfiction ? |
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