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2
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Helping children learn mathematics / Mathematics Learning Study Committee ; Jeremy Kilpatrick and Jane Swafford, editors.
- 372.7 H483
- National Academy Press,
- [2002] ©2002
- Washington, DC :
-
Biodiversity / ed. E.O. Wilson ; associate ed. Frances M. Peter.
- National Academy Press,
- 1988.
- Washington, DC :