Naphta gudron sandstone and asphalt stone in the Wolga district
21.6.2.327 английский (eng)/Naphta gudron sandstone and asphalt stone in the Wolga district / Goloobiatnikoff, D.V.Naphta gudron sandstone and asphalt stone in the Wolga district / Goloobiatnikoff, D.V.Naphta gudron sandstone and asphalt stone in the Wolga district.С.Петербургъ/, 1908 ( ). - 1908. - ; 8° см.Naphta gudron sandstone and asphalt stone in the Wolga district. С.Петербургъ, 1908 .