@article{1183425183, author = {Safford, F. H.}, title = {Review: George Henry Lepper, From Nebula to Nebula}, journal = {Bull. Amer. Math. Soc.}, volume = {27}, number = {3}, year = {1920}, pages = { 182-183}, language = {en}, url = {http://dml.mathdoc.fr/item/1183425183} }
Safford, F. H. Review: George Henry Lepper, From Nebula to Nebula. Bull. Amer. Math. Soc., Tome 27 (1920) no. 3, pp. 182-183. http://gdmltest.u-ga.fr/item/1183425183/