(NdOBY^A I OBRABOTKA PRIRODNOGO KAMNQ (B/s - (NoRLOW(B, (NaLEKSANDR mIHAJLOWI^s ((NmOSKWA (B:s (NsTROJIZDAT(B,s, 1977)
Keywords: (NkAMENX (B- (NoBRABOTKAs