Persistent identifier https://phaidra.univie.ac.at/o:1497645
Handle https://hdl.handle.net/11353/10.1497645
URI https://valep.vc.univie.ac.at/virtualarchive/public/Folder_43_Excerpts_Veblen_and_Young_A_Set_of_Assumptions_for_Projective_Geometry_1921_1921/a:653940