ORIGINAL
Persistent identifier https://phaidra.univie.ac.at/o:1534618
Handle https://hdl.handle.net/11353/10.1534618
URI https://valep.vc.univie.ac.at/virtualarchive/public/Wayne_R_Gruner_NSF_to_Carnap_1961-02-08_L_Original/dv:871402