اﻷونكتـاد &quot; Enhanced recuperation and recycling: implications for primary commodity producers in developing countries - the case of ferrous scrap versus iron ore &quot; (UNCTAD/COM/43,) Geneva, l0 June l994, p. 6.
ЮНКТАД, &quot; Enhanced recuperation and recylcing: implications for primary commodity producers in developing countries - the case of ferrous scrap versus iron ore &quot; (UNCTAD/COM/43), Женева, 10 июня 1994 года, стр. 6.