Dr. GINO PARENTI 
of the Technical Direction of the **Ottico Meccanica 
ltaliana e Rilevamenti Aerofotogrammetrici,, 
/ DEVICE FOR RECORDING THE NADIR 
/ POSITION DIRECTLY ON THE PHOTOGRAPH Uni 
AT THE EXPOSURE CIN 
  
  
  
COMMUNICATION TO THE VII INTERNATIONAL 
CONGRESS OF PHOTOGRAMMETRY - WASHINGTON (U.S. A.) 
4-16 SEPTEMBER 1952 
  
ROME 1952