at in 
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d by 
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been 
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been 
ingle 
| the 
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tive 
ans- 
Pror. GIOVANNI BOAGA 
General Director of Italian Cadaster 
THE «NISTRL, 
PHOTOSTEREOGRAPH 
MOD. BETA (1951) 
COMMUNICATION TO THE VII INTERNATIONAL 
CONGRESS OF PHOTOGRAMMETRY - WASHINGTON (U.S. A.) 
4-16 SEPTEMBER 1952 
ROME 1952