(N|PIDEMIOLOGIQ (B:s (Nu^EBNIK (B/s - (NbEZDENEVNYH(B, (NiWAN sEMENOWI^s ((NmOSKWA (B:s (NmEDICINA(B,s, 1977)
Keywords: (N|PIDEMIOLOGIQs -- (Nu^EBNIKIs