INTERNATIONAL SOCIETY FOR PHOTO G RAMMETRY 
COMMISSION II 
THE WORKING GROUP ON FUNDAMENTAL PROBLEMS 
FUNDAMENTAL PROBLEMS IN 
PHOTO G RAMMETRY 
REPORT ON WORK PERFORMED DURING 
THE PERIOD 1960-1964 
B. HALLERT 
PRESIDENT 
L. OTTOSON K. A. OH LI N 
ASSOCIATE ASSOCIATE 
STOCKHOLM 1964