Maxim Gorkiy wrote after visiting Baku: "The oil fields remained in my memory as a perfect picture of the grave hell. This picture suppressed all the fantastic ideas of depressed mind, I was aware of". Well-known—at that time—industrialist V. Rogozin noted, in relation with the Baku oil fields, that everything there was done "without counting and calculating". In 1940, 22.2 million tons of oil were extracted in Baku which comprised nearly 72% of all the oil extracted in the entire USSR.