00509naa#a2200169#i#450# EN\\bibl\113221 20260119045552.1 2311-1402 20090625b2009####ek#y0engy0150####ca RUS RU Izuchenie mezolita Severnogo Kazakhstana (do kontsa 80-kh gg. KhKh stoletiya) Journal article Nizhnevartovsk Nizhnevartovsk State University 2009 4 с. Journal article local Grebenyukov V I vestnik.nvsu.ru