Thakur Anita <br/><br/>
Theoretical approach to self focusing by paraxial ray approximation 
Thakur Anita 
 - Dr   B R 
 - Jalandhar  Dr   B R  Ambedkar  National institute o  2008 
 - 47 
<br/><br/><label>Dewey Class. No.: </label>539.722  / TH-T