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How and Why Wonder Book of Insects
by Ronald N. Rood, Illustrated by Cynthia and Alvin Koehler
from Wonder Books
for 3rd-6th grade
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How and Why Wonder Book of Trees
by Geoffrey Coe, Illustrated by Cynthia Iliff Koehler & Alvin Koehler
1972 Printing
from Grosset & Dunlap
for 4th-8th grade
in Botany & Mycology
(Location: SCI-BOT)
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How and Why Wonder Book of Trees
by Geoffrey Coe, Illustrated by Cynthia Iliff Koehler & Alvin Koehler
1972 Printing
from Grosset & Dunlap
for 4th-8th grade
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How and Why Wonder Book of Wild Flowers
by Grace F. Ferguson, illustrated by Cynthia Iliff Koehler and Alvin Koehler
from Wonder Books
for 3rd-6th grade
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