P. S. S. C. physics : teacher's resources book and guide/ 
NCERT 
 - New Delhi:  NCERT,  1964 
 - II-17(1)p.; 29p.; 19-23p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physics
<br/><br/><label>Dewey Class. No.: </label>530.1 NAT-P