(NmESTOROVDENIQ PRIRODNYH BITUMOW (B/s - (NhALIMOW(B, (N|LIK mALITOWI^s; (NaKI[EW(B, (Ni(B.(Nm(B.s; (NvABREWA(B, (Np(B.(Ns(B.s ((NmOSKWA (B:s (NnEDRA(B,s, 1983)
(NaWT(B. (NUKAZANY NA OBOROTE TIT(B. (NL(B.s
Keywords: (NbITUMY PRIRODNYE (B- (NmESTOROVDENIQs