ORIGINAL
Persistent identifier https://phaidra.univie.ac.at/o:1685266
Handle https://hdl.handle.net/11353/10.1685266
URI https://valep.vc.univie.ac.at/virtualarchive/public/Fifth_International_Congress_for_the_Unity_of_Science_Active_Members_1939-09_M_Original/dv:952876