Before revision: But regional breakdowns were omitted in the yearbooks from 1973, except for a few 1975 figures.Theodore Shabad and Victor L. Mote: Gateway to Siberian Resources (The BAM) p. 54 (Halstead Press/John Wiley, New York, 1977) Energy sources Coal In the important Chelyabinsk coalfields, production rose from 390,000 tonnes in 1925 to 3,519,000 tonnes in 1936.
After revision: DADDY CHILLBut regional breakdowns were omitted in the yearbooks from 1973, except for a few 1975 figures.Theodore Shabad and Victor L. Mote: Gateway to Siberian Resources (The BAM) p. 54 (Halstead Press/John Wiley, New York, 1977) Energy sources Coal In the important Chelyabinsk coalfields, production rose from 390,000 tonnes in 1925 to 3,519,000 tonnes in 1936.