(NsTEREOMETRI^ESKIE ZADA^I NA PROEKCIONNOM ^ERTEVE (B/s - (N~ETWERUHIN(B, (Nn(B.(Nfs; (NaKADEMIQ PEDAGOGI^ESKIH NAUK rsfsr(B.s (NnAU^NO(B-(NISSLEDOWATELXSKIJ INSTITUT METODOW OBU^ENIQs ((NmOSKWAs (NlENINGRAD (B:s (NiZDATELXSTWO AKADEMII PEDAGOGI^ESKIH NAUK rsfsr(B,s, 1947)
Keywords: (NnA^ERTATELXNAQ GEOMETRIQs