I didn't know that! / by the editors of OWL magazine ; compiled and edited by Katherine Farris. - Toronto : Greey de Pencier Books, c1988. - 77 p. : ill. (some col.) ; 28 cm.

Includes index.

ISBN: 0920775314 :

Nat. Bib. Agency Control No.: 870953435

Subjects--Topical Terms:
Science--Miscellanea--Juvenile literature.
Sciences--Miscellanées--Ouvrages pour la jeunesse.

Dewey Class. No.: j500