Water :origins and demand conservation and abstraction  :environmental control and public health 

 - Milton Keynes:  The Open University,  1975. 
 - 125p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water-Pollution.<br/>Public health.
<br/><br/><label>Dewey Class. No.: </label>614.7  / OPP