RAW MATERIAL BASE OF HARD-TO-EXTRACT OIL RESERVES OF RUSSIA.Published in:Periódico Tchê Química, 2020, v. 17, n. 34, p. 915, doi. 10.52571/ptq.v17.n34.2020.939_p34_pgs_915_924.pdfBy:PRISCHEPA, Oleg M.;NEFEDOV, Yury V.;KOCHNEVA, Olga E.Publication type:Article