Oil in the north of Russia: an essay on the Ukhta oil region;(Dep.

Oil in the north of Russia: an essay on the Ukhta oil region;(Dep./ Kind, V. - St. Petersburg: [B.I.], 1910. -Ex.def.: None S. 3-6, 9-10, 15-16, 31-34, 39-40..Source of electronic copy: NBR Komi