Spon's mechanical and electrical services price book 1989 /    
edite d by David Longdon and Everest. 
 - 20th ed. 
 - London :   E. & F. N. Spon,   1988. 
 - xvi. 562 p. :    illus. ;    24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Heating --Estimates --Great Britain.----<br/>Air conditioning --Estimates --Great Britain.----
<br/><br/><label>Dewey Class. No.: </label>697