Ashraf, <br/><br/>
Vector Analysis With Applications  Textual Documents 
Ali Ashraf ,Abdul Khaleq Hazra 
 - Ist ed - 1977. 
 - New Delhi  New Age International ( P ) Limited 
 - 308p:  21cm. 
<br/><br/><label>ISBN: </label>81-224-0548-4 
<br/><br/><label>Subjects--Index Terms: </label>Vector Analysis G - Math 
<br/><br/><label>Dewey Class. No.: </label>512.89