@article{SHC_1949-1950__2__A17_0,
     author = {Wu, Wen-Ts\"un},
     title = {Les classes caract\'eristiques d'un espace fibr\'e. {II}},
     journal = {S\'eminaire Henri Cartan},
     note = {talk:18},
     pages = {1--5},
     publisher = {Secr\'etariat math\'ematique},
     volume = {2},
     year = {1949-1950},
     language = {fr},
     url = {http://www.numdam.org/item/SHC_1949-1950__2__A17_0/}
}