Small-scale solar-powered pumping systems :  the technology, its economics and advancement: main report / 
Sir William Halcrow et al. 
 - LOndon :  Sie William H & Parners,  1983. 
 - ca. 250 p. :  ill. ;  28 cm. 
<br/><br/> Open. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Solar energy--Technological innovations.<br/>Solar energy--Economic aspects.<br/>Renewable energy sources--Economic aspects.<br/>Renewable energy sources--Technological innovation.