Langley, Billy C.,  1931- <br/><br/>
Plant maintenance 
Billy C. Langley 
 - Reston, Va  Reston Pub. Co.  1985 
 - v, 458 p.  ill.  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant maintenance
<br/><br/><label>Dewey Class. No.: </label>658.2