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@article{AM2_1974__11_136440, author = {W.D. Wallis}, title = {Construction of {Skew} {Room} {Squares.}}, journal = {Aequationes mathematicae}, pages = {111--113}, publisher = {mathdoc}, volume = {11}, year = {1974}, zbl = {0373.05027}, url = {http://geodesic.mathdoc.fr/item/AM2_1974__11_136440/} }
W.D. Wallis. Construction of Skew Room Squares.. Aequationes mathematicae, Tome 11 (1974), pp. 111-113. http://geodesic.mathdoc.fr/item/AM2_1974__11_136440/