Air.   Units 14-16,  Air quality management / 
Prepared by the Course Team. 
 - Milton Keynes :  The Open University,  1993. 
 - 159 p. :  ill. ;  30 cm. 
 - Environmental control and public health. .
<br/><br/> Technology : a second level course. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0749261781(pbk.)