TY  - BOOK
ED  -  United Nations Industrial Development Organization.
ED  -  United Nations.
ED  -  Expert group meeting on lead and zinc industries 
TI  -  Technological developments in lead and zinc production and their sig nificance production and their significance to developing countriesrepo rt / 
PY  - 1970///
CY  -  New York : 
PB  -  United Nations, 
KW  -  Lead and zinc production
KW  -  Developing countries
KW  -  Lead and zinc industry
ER  -