Williams, Keith. <br/><br/>
Environmental degradation, unit 12 /  Unit 12.  Environmental degradation 
Keith Williams ...[et al.] ; [edited by] David Douglas. 
 - Milton Keynes :  Open University Press,  1982. 
 - 36 p. :  ill. ;  30 cm. 
 - Technology : a second level course (engineering materials : an introduction) .
 - Technology T252 .
<br/><br/><label>ISBN: </label>0335171079 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Materials.