@article{1183495096, author = {Snyder, Virgil}, title = {Edge on Theory of Ruled Surfaces}, journal = {Bull. Amer. Math. Soc.}, volume = {37}, number = {12}, year = {1931}, pages = { 791-793}, language = {en}, url = {http://dml.mathdoc.fr/item/1183495096} }
Snyder, Virgil. Edge on Theory of Ruled Surfaces. Bull. Amer. Math. Soc., Tome 37 (1931) no. 12, pp. 791-793. http://gdmltest.u-ga.fr/item/1183495096/