1.
Why Do Leaves Change Color? (Library of Why)
by Marian B. Jacobs, Nancy Ell...
ISBN: 9780823952755
List Price: $23.60
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3.
Why is the Sky Blue? (Library of Why?)
by Marian B. Jacobs, Marion B....
ISBN: 9780823952717
List Price: $22.60
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Coping with Hereditary Diseases
by Marian B. Jacobs, Marion B....
ISBN: 9780823928231
List Price: $35.60
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Why Did the Dinosaurs Become Extinct? (Library of Why)
by Marian B. Jacobs, Nancy Ell...
ISBN: 9780823952762
List Price: $23.60
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Why Does It Rain? (Library of Why)
by Marian B. Jacobs, Nancy Ell...
ISBN: 9780823952731
List Price: $23.60
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Why Do Oceans Have Tides? (The Library of Why)
by Marian B. Jacobs, Nancy Ell...
ISBN: 9780823952724
List Price: $23.60