伯朝拉河
Significant place in the works of Engels Kozlov took issue industrial development of the Russian North. A lot of sketch from the life imported from numerous trips to the oil workers of Ukhta (1961–1963), Inta miners (1961–1963, 1964, 1966, 1987–1989), from the Pechora River region (1965, 1968, 1969) became the basis of paintings that have brought the artist fame. First of all, the paintings "Black Gold" (1969), "Drillers at Colva" (1971), "Pechora oil workers"(1975).