Oxford junior encyclopaedia / edited by Laura E. Salt and Robert Sinclair ; Illustrated by Helen Mary Petter. - 1st ed. - London : Oxford University Press, 1957. - Vols. : ill. ; 25 cm. V. 6- Farming and fisheries ; 300 300 Subjects--Topical Terms: Children's encyclopedias and dictionaries. Dewey Class. No.: 032 / O2