(NwANADIJ W PRIRODE I TEHNIKEs - (NsLOTWINSKIJ(B-(NsIDAK(B,(Nn(B. (Np(B.s (NnIKOLAJ pETROWI^s; (NaNDREEW(B,(Nw(B. (Nk(B.s (NwADIM kRONIDOWI^s ((Nm(B.s (NzNANIEs, 1979)