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African census programme newsletter 1972
(1972-12)
African census programme newsletter
(1972-06)
Mobilization of domestic resources
(1971-03)
Foreign trade newsletter: No.36
(1973-05)
Selected texts: hydro power from energy for rural development Nas, Washington DC
(1978-06)
The water turbine differs from the waterwheel in that there is a contrived steady flow of water through passages created by the turbine blades or buckets. There are well-established classes of turbines generally classified ...
Foreign trade newsletter: no. 40
(1975-07)
Natural resources newsletter No. 22
(1974-11)
The Natural Resources Division of the ECA has re-examined its Programme of Work and Priorities for 1974-75 and the draft Medium-Term Plan for 1976-79 and identified critical areas of action in the field of energy, minerals ...