Young people's science encyclopedia.
- [Rev. ed.]
- Chicago, Childrens Press; c1991.
- v. 13/Oi-Pi illus. (part col.) col. maps, ports. 26 cm.
64003917
Science--Dictionaries. [from old catalog]--Encyclopedia
Q121 / YOU
503 / YOU
64003917
Science--Dictionaries. [from old catalog]--Encyclopedia
Q121 / YOU
503 / YOU