Rai, Ajay. <br/><br/>
Vikas objective book of knowledge / 
Ajay Rai 
 - India:  VIKAS PUBLISING,  1980. 
 - vi,225 p. ;  18 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Knowledge, theory of
<br/><br/><label>Dewey Class. No.: </label>001  / RAV  1980