(NuLXTRA(B-(NKOROTKIE WOLNY (B/s - (NpETROW(B, (NnIKOLAJ aLEKSEEWI^s ((NmOSKWA (B;s (NlENINGRAD (B:s (NgOS(B. (NNAU^(B.-(NTEHN(B. (NIZD(B-(NWO(B,s, 1932)
Keywords: (NrADIOWOLNY ULXTRAKOROTKIEs