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Industrial production
(1972)
Dynamic factors in industrial productivity
Melman, Seymour, (1956)
A new index of Czechoslovak industrial output, 1937 and 1947-1965
Lazarcik, Gregor, (1968)
Bulgaria : a new industrial production index, 1963-1972, with extension to 1973 and 1974
Staller, George John, (1975)