Needham, Joseph <br/><br/>
Science and civilization in China  Joseph Needham. 

 - Cambridge  University Press  1986 
 - ill., 26cm 
 - (V.5/part-7). .
<br/><br/> Chemistry and chemical technology, part-7 Military technology: the gunpowder Epic. 
<br/><br/><label>ISBN: </label>521303583 
<br/><br/><label>Dewey Class. No.: </label>509.51,  / N37S