Porteous,Andrew <br/><br/>
Maintaining the environment 
By Andrew Porteous 
 - Buckinghamshire  Open University  1972 
 - 102p. 
<br/><br/><label>ISBN: </label>335 02533 1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Saline water conversion -- Distillation process.
<br/><br/><label>Dewey Class. No.: </label>X9 oh2 26 - 7