NCERT. <br/><br/>
Improved Science Teaching in Schools  Textual Documents 

 - 1963. 
 - India:  National Council of Educational Research and Trainnig ,  1963. 
 - iv;188p.:  03254-G. 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Statistics, Summer Institutes and Seminars,The Physical Science Study  Committee.
<br/><br/><label>Dewey Class. No.: </label>G5 N1