Heafford, Philip Ernest.
The math entertainer [by] Philip Heafford. - New York, Emerson Books 1959. - 176 p. : ill. ; 20 cm.
59011799
Mathematical recreations.
QA95 / .H37
510 / HEM
The math entertainer [by] Philip Heafford. - New York, Emerson Books 1959. - 176 p. : ill. ; 20 cm.
59011799
Mathematical recreations.
QA95 / .H37
510 / HEM