It was divided into five units (Kiviõli, Küttejõu, Kohtla-Järve, Sillamäe, Kohtla), each consisting oil-shale mine and shale-oil plant, except Küttejõu, which did not have its own oil plant.
Each consisted of an oil shale mine and shale oil plant, except Küttejõu, which did not have an associated oil plant. It was divided into five units (Kiviõli, Küttejõu, Kohtla-Järve, Sillamäe, and Kohtla).
It was divided into five units (Kiviõli, Küttejõu, Kohtla-Järve, Sillamäe, and Kohtla). Each consisted of an oil shale mine and shale oil plant, except Küttejõu, which did not have an associated oil plant.
It was divided into five units (Kiviõli, Küttejõu, Kohtla-Järve, Sillamäe, and Kohtla). Each consisted of an oil shale mine and shale oil plant, except Küttejõu, which did not have an associated oil plant.