Report of study group-I and 1V, Report study group 

 - Delhi  Manager of Publication India         1974 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electrical
<br/><br/><label>Dewey Class. No.: </label>X 9(D66).2.N69t, L4