UNIDO, Industrial Processing of Natural Resources. New York: United Nations. 1981. viii + 78pp.US $ 5.00. [United Nations Publication Sales No. E. 81. 11 . B.1]. pdr [Internet]. 2022 Dec. 23 [cited 2025 Jun. 9];21(4):pp.329-333. Available from: https://thepdr.pk/index.php/pdr/article/view/606