c - (NgAPANCQN(B, (NgR(B.s ((NpETROGRAD (B:s (NtIP(B. (NiMP(B. (NaKADEMII NAUK(B,s, 1916)
Keywords: (NqZYKOZNANIEs; (NdREWNEARMQNSKIJ QZYKs