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A new index of Czechoslovak industrial output, 1937 and 1947-1965
Lazarcik, Gregor, (1968)
Bulgaria : growth of industrial output, 1939 and 1948-1965
The measurement of changes in production : the index of industrial production and the output-based measure of gross domestic product
(1976)
Czechoslovak industrial production, 1948-1972
Staller, George John, (1975)