Riddles in mathematics /
Northrop, Eugene P.
Riddles in mathematics / Eugene P. Northrop - Harmondsworth : Penguin, 1961 - 239 p. ; 22 cm.
Mathematics
Mathematical recreations
Riddles in mathematics / Eugene P. Northrop - Harmondsworth : Penguin, 1961 - 239 p. ; 22 cm.
Mathematics
Mathematical recreations
