Report of the advisory board on the  principles for the control of public 

 -  1948 
 - 30p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electrical
<br/><br/><label>Dewey Class. No.: </label>X9(D66) :6.2.N44t, H8/GD