Murphy, Stewart <br/><br/>
How they were built bridges / 
by J. Stewart Murphy ; illustrated by Charles Keeping 
 - London :  Oxford University Press,  1958 
 - 30 p. :  ill. (some col.) ;  27 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Architecture, Ancient<br/>Buildings
<br/><br/><label>Dewey Class. No.: </label>722