Exercises in mental arithmetic /
Scott, Pearl.
Exercises in mental arithmetic / Pearl Scott - New Delhi : Frank Bros. and company, 1989. - 100 p. : ill. ; 21 5 cm.
513 SCO
Exercises in mental arithmetic / Pearl Scott - New Delhi : Frank Bros. and company, 1989. - 100 p. : ill. ; 21 5 cm.
513 SCO