Seeing through arithmetic.
Hartung, Maurice Leslie, 1902-
Seeing through arithmetic. - Chicago : Scott, Foresman, 1960. - 4 v. : col. ill. ; 24 cm.
Special book A.
Arithmetic -- Study and teaching (Elementary).
511 HAR
Seeing through arithmetic. - Chicago : Scott, Foresman, 1960. - 4 v. : col. ill. ; 24 cm.
Special book A.
Arithmetic -- Study and teaching (Elementary).
511 HAR