Silverberg, Robert. <br/><br/>
Bridges / 
by Robert Silverberg. 
 - Philadelphia :  Macrae Smith,  1966. 
 - 189 p. :  ill. 
<br/><br/> Discusses the history of bridges from ancient times to the present and describes the building of various types of bridges. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bridges--History--Juvenile literature.<br/>Bridges--History.