(NkATALITI^ESKIE QWLENIQ W PRIRODE (B/ s - (NiPATXEW(B, (NwLADIMIR nIKOLAEWI^s; (NbLOH(B, (Nm(B. (Na(B.s ((NpETROGRAD (B: s (NnAU^(B. (NHIM(B.-(NTEHN(B. (NIZD(B-(NWO (B,s, 1922)
Keywords: (NkATALIZ (B- (NqWLENIQ W PRIRODEs