TY  - BOOK
TI  -  Non-ferrous metals industry (copper, aluminium, tin, lead and zinc) : : a survey of their production and potential in the developing count ries
PY  - 1972///
CY  -  New York : 
PB  -  United Nations, 
KW  -  Nonferrous metal industries
KW  -  Developing countries
ER  -