  1982 - Purple Cow to the Rescue (Paperback) → Hardcover ISBN-13: 9780316151061 ISBN-10: 0316151068 Genre: Parenting & Relationships ?  1972 - I Saw a Purple Cow and 100 Other Recipes for Learning (Hardcover) → Paperback ISBN-13: 9780316151740 ISBN-10: 0316151742 Genres: Children's Books, Nonfiction ? |
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