Description: Fundamental number teaching/

Main Author:	Polkinghorne, Ruby Kathleen, 1883-
Other Authors:	Polkinghorne, Mabel Irene Rutherford,
Format:	Book
Language:	English
Published:	London: George G. Harrap, [1955]
Subjects:	Arithmetic > Study and teaching

Physical Description:	196 p. : ill. ; 20 cm.