Osborn, Jesse. Cage champions : adventures with numbers / Jesse Osborn and Adeline Riefling ; illustrated by Sally Camana. - Saint Louis : Webster, c 1948. - viii, 344 p. : ill. ; 22 cm. Includes index. 400 400 Subjects--Topical Terms: Arithmetic.Mathematics -- Problems, exercises, etc. Dewey Class. No.: 510 / O2c