@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/