Werthmann, Christian,  1964- <br/><br/>
Green roof :  a case study / 
Christian Werthman. 
 - New York :  Princeton Architectural Press,  c2007. 
 - 159 p. :  ill. (some col.), col. map, plans (some col.) ;  24 cm. 
<br/><br/>Includes bibliographical references (p. 158-159) 
<br/><br/><label>ISBN: </label>9781568986852 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Green roofs (Gardening)<br/>Green roofs (Gardening)--Washington (D.C.)--Case studies.