Greig, James. <br/><br/>
John Hopkinson: electrical engineer / 
by James Greig. 
 - London :  H.M.S.O.,  1970. 
 - 44p. 
 - Booklets (Science Museum) .
 - Booklets (Science Museum) .
<br/><br/><label>ISBN: </label>0112900801 (sd) 
<br/><br/><label>Subjects--Personal Names: </label><br/>Hopkinson, John.