Gladstone, John <br/><br/>
Ductwork estimating for HVAC / 
John Gladstone. 
 - Pottstown, PA:   PAL Publications,   1992.  
 - 41 p. :  tables, ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>0930644166 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air conditioning--Handbooks, manuals, etc.<br/>Heating--Handbooks, manuals, etc.<br/>Ventilation--Handbooks, manuals, etc.
<br/><br/><label>Dewey Class. No.: </label>697