Vasishtha, A.R, <br/><br/>
Modern Algebra  Textual Documents 
By A.R.Vasishtha & A.K.Vasishtha 
 - 69th ed. 
 - Meerut:  Krishna Prakashan Media .,  2016. 
 - pg 563:  20cm. 
<br/><br/><label>Subjects--Index Terms: </label>Algebra Mathematics Modern Algebra G- Statistics 
<br/><br/><label>Dewey Class. No.: </label>512