Oxford junior encyclopaedia /
edited by Laura E. Salt and Robert Sinclair ; Illustrated by Helen Mary Petter.
- London : Oxford University Press, 1957.
- Vols. : ill. ; 25 cm.
V. 8- Engineering ;
324 324
Children's encyclopedias and dictionaries.
032 / O2
V. 8- Engineering ;
324 324
Children's encyclopedias and dictionaries.
032 / O2