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@article{AM2_1972__8_136286, author = {T.W. Cusick}, title = {View-Obstruction {Problems.} {(Short} {Communications).}}, journal = {Aequationes mathematicae}, pages = {197--198}, publisher = {mathdoc}, volume = {8}, year = {1972}, url = {http://geodesic.mathdoc.fr/item/AM2_1972__8_136286/} }
T.W. Cusick. View-Obstruction Problems. (Short Communications).. Aequationes mathematicae, Tome 8 (1972), pp. 197-198. http://geodesic.mathdoc.fr/item/AM2_1972__8_136286/