Flat roofs  [videorecording] / 
University of England 
 - England:  University of England,  1998 
 - 1 videodisc (27 min.) :  sd., col. ;  4 3/4 in. 
<br/><br/> Title from title screen 
<br/><br/> Tracing the development of flat roofs and identifying the principles and practices of modern construction, this program discusses lead roofing, built-up felts, asphalt, and single-ply membranes 
<br/><br/><br/>DVD format 
<br/><br/><label>ISBN: </label> RM 748.22 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Flat roofs<br/>Roofs