Jelaskan Rujukan dari Perindustrian berat dalam bahasa melayu

Morris Teubal, Heavy and Light Industry in Economic Development The American Economic Review, Vol. 63, No. 4. (Sep., 1973), pp. 588–596.

Some Definitions in the Vocabulary of Geography, IV, British Association Glossary Committee, The Geographical Journal, Vol. 118, No. 3. (Sep., 1952), pp. 345–346.