Appropriate technologies for developing countries
Eckaus, Richard S.
Appropriate technologies for developing countries - Washington National Academy of Sciences 1977 - xii,140p. 23cm.
Underdeveloped areas Technology
HC59.7.E25
Appropriate technologies for developing countries - Washington National Academy of Sciences 1977 - xii,140p. 23cm.
Underdeveloped areas Technology
HC59.7.E25