Gurstelle, William, <br/><br/>
The art of the catapult :  build Greek ballistae, Roman onagers, English trebuchets, and more ancient artillery / 
William Gurstelle. 
 - First edition 
 - xvii, 172 pages :  illustrations ;  25 cm. 
<br/><br/>Includes bibliographical references (p. 167-168) and index. 
<br/><br/><label>ISBN: </label>1556525265 
<br/><br/><label>LCCN: </label>2004004866 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Catapult--History.<br/>Ballista--History.<br/>Catapult--Design and construction.<br/>Ballista--Design and construction.
<br/><br/><label>LC Class. No.: </label>U875  / .G87 2004 
<br/><br/><label>Dewey Class. No.: </label>623.4/41