Modernization and mechanization of salt industries based non seawater in developing countries /
United Nations
- New York : United Nations, 1970.
- 161p. : ill., graphs ; 29 cm.
- Energy resources development series ; no. 21 .
Biogas--Developing countries.
664.4 / UNM
Biogas--Developing countries.
664.4 / UNM
