Persistent identifier https://phaidra.univie.ac.at/o:1684848
Handle https://hdl.handle.net/11353/10.1684848
URI https://valep.vc.univie.ac.at/virtualarchive/public/Philipp_Frank_Memo_to_the_Members_of_the_Board_of_the_Institute_for_the_Unity_of_Science_1949-07-20_M_Original/dv:952576