XR1 
XS1 
XWI1 
XV2 
Reports from O.E.E.P.E.; time-table serial numbers 252, 251 and 133. 
  
   
  
  
  
   
    
T. Rumboldt, Italy: Application de la photogrammétrie aérienne aux levers 
cadastraux des agglomérations báties. 
M. Santoni, Italy: Considerations on photogrammetrie plotting instru- 
ments utilizing mechanical projection. 
P. Wiser, Belgium: Procés-verbal de l'essai contrólé N? 1. 
J. S. Veenenbos, Netherlands: Aerial photo-interpretation and analysis for 
soil survey and land classification purposes. 
lvar Heeggstróms Boktrycekeri AB - Stockholm 1957 
570117