@article{10_1017_S0008439500028873,
     author = {Lambek, J.},
     title = {536 {Puzzles} and curious problems, by {Henry} {E.} {Dudenay} {Saunders} of {Toronto} {Ltd.,} 1967. 428 pages. $9.75.},
     journal = {Canadian mathematical bulletin},
     pages = {158--158},
     year = {1968},
     volume = {11},
     number = {1},
     doi = {10.1017/S0008439500028873},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0008439500028873/}
}