The Otto Dunkel Memorial Problem Book (The American Mathematical Monthly Supplement) 1957 · ENGLISH · PDF View details →
Return to Mathematical Circles: A Fifth Collection of Mathematical Stories and Anecdotes 1987 · ENGLISH · DJVU View details →
Mathematical Circles Revisited: A Second Collection of Mathematical Stories and Anecdotes 1972 · ENGLISH · DJVU View details →
Return to mathematical circles: a fifth collection of mathematical stories and anecdotes 1988 · ENGLISH · DJVU View details →
Mathematical circles revisited; a second collection of mathematical stories and anecdotes 1971 · ENGLISH · DJVU View details →