| Details | | Publication Date: | 1999-08-01 | | Series: | Sorting Out |
| Size | | Length: | 32 pages | | Height: | 9.5 in | | Width: | 8.0 in | | Thickness: | 0.2 in | | Weight: | 9.6 oz |
Publisher's Note Introduces basic scientific concepts and terms; lays out the simple way animals without backbones are organized, including spreads on insects, mollusks, sponges, flat worms, round worms, segmented worms, and more.
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