LAUSANNE, 9—20 JULY 1968. [^ LANTMÄTERSTYAELSEN 
  
  
  
  
XI. International 
Congress 
of Photogrammetry 
Commission IV. Application of Photogrammetry for Surveying the Earth's Surface. 
Group of Interest IV/1. Surveying and mapping for cadastral, agricultural and forestry engineering. 
Working Group IV/1 for the International Controlled Photogrammetric Experiment Pecny 
1966—1968. 
Report of the Experiment Pecny' 1966—1968 
by Sven G. Möller. 
  
On the Deformation 
of Polyester film 
A study of the deformations of polyester base film used in the international controlled 
photogrammetric experiment PECNY' 1966—1968 
Prof. Dr. R. S. Halonen 
Dipl. Eng. Aino Savolainen