Young people's science encyclopedia.
- [Rev. ed.]
- Chicago, Childrens Press [1963- v. i, 1964]
- v.8/FI-Gr 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