TY  - BOOK
AU  - Lange,Bruno
AU  - John,Ancel
TI  - Photoelements and their application 
U1  - 770 LAN  
PY  - 1938///.
CY  - New York : 
PB  - Reinhold Publishing Corporation, 
KW  - Photoelectric cells
N1  - Includes index.
ER  -