■I 
INTERNATIONAL INSTITUTE 
FOR 
AERIAL SURVEY 
AND 
EARTH SCIENCES (ITC) 
DELFT, THE NETHERLANDS 
INVITED PAPER FOR COMMISSION I 
Working Group 4 
F. L. J. H. CORTEN 
PERFORMANCE AND COST OF 
FLIGHT FUNCTIONS 
ELEVENTH CONGRESS OF THE INTERNATIONAL SOCIETY FOR PHOTOGRAMMETRY. LAUSANNE 1968 
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