Mann, R. D. <br/><br/>
How to build a cretan sail wind-pump for use in low-speed wind conditions / 
by R. D. Mann. 
 - [London] :  Intermediate Technology Publications,  1979. 
 - 79 p. :  ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wind pumps--Design and construction.