FACIES DU PERMIEN INFERIEUR DU RECIF BARRIERE PETROLOGAZIFERE DANS LA REGION DE LA VOLGA PRES DE SARATOVGRACHEVSKIJ MM; SIPKO TA.1973; DOKL. AKAD. NAUK S.S.S.R.; S.S.S.R. ; 1973, VOL. 210, NUM. 0002, P. 419 A 421Serial Issue

RANGE OF THE UPPER ARTINSKIAN SUBSTAGE IN THE VOLGA REGION BETWEEN SARATOV AND VOLGOGRAD.SHAFIRO YA SH; SIPKO TA.1973; DOKL. EARTH SCI. SECT.; USA; DU RUSSE: DOKL. AKAD. NAUK S.S.S.R., S.S.S.R. 1973; 213, NO 3, 685-687,1973, VOL. 213, P. 77 A 78Miscellaneous

FACIES OF THE LOWER PERMIAN PETROLIFEROUS BARRIER REEF IN THE SARATOV PART OF THE TRANSVOLGA REGION.GRACHEVSKIY MM; GRACHEVSKIJ MM; SIPKO TA et al.1973; DOKL. EARTH SCI. SECT.; USA; DU RUSSE: DOKL. AKAD. NAUK S.S.S.R., S.S.S.R. 1973; 210, NO 2, 419-421,1973, VOL. 210, P. 59 A 61Miscellaneous