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INTERNATIONAL SOCIETY FOR PHOTOGRAMMETRY 
COMMISSION II 
THE INTERCOMMISSION AL WORKING GROUP ON FUNDAMENTAL PROBLEMS 
Commission II 
Invited Paper 
Intercomm. Working Group I 
QUALITY PROBLEMS IN 
PHOTOG RAMMETRY 
REPORT ON WORK, PERFORMED DURING 
THE PERIOD 1964—1968 
P. KAASILA 
ASSOCIATE 
B. HALLERT 
PRESIDENT 
L. OTTOSON 
ASSOCIATE 
K. A. ÖHLIN 
ASSOCIATE 
STOCKHOLM 1967