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How and Why Wonder Book of Ants and Bees
by Ronald N. Rood, Illustrated by Cynthia and Alvin Koehler
from Grosset & Dunlap
for 3rd-6th grade
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How and Why Wonder Book of Fish
by Geoffrey Coe, illustrated by Cynthia IlIff Koehler and Alvin Koehler
1972 Printing
from Grosset & Dunlap
for 3rd-6th grade
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How and Why Wonder Book of Insects
by Ronald N. Rood, Illustrated by Cynthia and Alvin Koehler
from Grosset & Dunlap
for 3rd-6th grade
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How and Why Wonder Book of Mushrooms Ferns and Mosses
by Amy Elizabeth Jensen, illustrated by Cynthia Iliff Koehler and Alvin Koehler
from Grosset & Dunlap
for 3rd-6th grade
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How and Why Wonder Book of Sea Shells
by Donald F. Low, illustrated by Cynthia and Alvin Koehler
from Grosset & Dunlap
for 3rd-6th grade
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