Calvert, N. G. <br/><br/>
Windpower principles  their application on the small scale illustrations by F. Cummins 
N.G. Calvert 
 - London [etc.]  Griffin  1979 
 - 122 p.  ill.  23cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wind power
<br/><br/><label>Dewey Class. No.: </label>621.4  / 5