(NvIWAQ PRIRODA W [KOLE (B:s (NpOSOBIE K PROIZWODSTWU NABL@DENIJ NAD VIWOJ PRIRODOJ W [KOLE I DOMA (B/s - (NzOLOTNICKIJ(B, (NnIKOLAJ fEDOROWI^s ((NmOSKWA (B:s (NgOS(B. (NIZD(B-(NWO(B,s, 1920)
Keywords: (NpRIRODOWEDENIE W [KOLEs