Cambridge u.a.: Cambridge Univ. Pr., 1977

Cambridge University Press (CUP), 1996

Cambridge University Press (CUP), 1983

The Mathematical Association, 1983

JSTOR, 1979

The Mathematical Association, 1979

Cambridge University Press (CUP), 1980

The Mathematical Association, 1980

Cambridge University Press (CUP), 1972

JSTOR, 1972

Longman Group Ltd., 1973

Cambridge University Press (CUP), 1973

G. Bell and Sons Ltd., 1972

G. Bell and Sons Ltd., 1972

G. Bell and Sons Ltd., 1973

G. Bell and Sons Ltd., 1973

Cambridge University Press (CUP), 1973

Longman Group Ltd., 1972

Cambridge University Press (CUP), 1968

National Council of Teachers of Mathematics, 1967