Sumner, John A <br/><br/>
An introduction to heat pumps 

 - Dorset  Prisma Press  1976 
 - 55p   
<br/><br/><label>ISBN: </label>0904727394 
<br/><br/><label>Subjects--Topical Terms: </label><br/>TECHNOLOGY
<br/><br/><label>Dewey Class. No.: </label>697.07  / SUM