|COMMISSION VII TK1 
Appendix to the INT. ARCHIVES OF 
PHOTOGRAMMETRY, Vol. XII:4, 1956 
  
  
Commission VII 
A METHOD FOR THE INVESTIGATION OF GROUND VISIBILITY IN 
AERIAL PHOTOGRAPHY OVER FOREST AREAS 
by 
T, Kvarnbrink - A. Thunberg 
R. Inst. of Technology, Stockholm 70 
Communication to 
VIII International Congress for Photogramme try 
Stockholm, April 1956 
OBE-tryck Stockholm 1956