876 
JAPAN 
Masataka Fuchimoto 
Asia Air Survey Co. Ltd. 
Tokyo 
MEXICO 
Vera Aurelio Gama 
CETENAL 
Mexico, D.F. 
NETHERLANDS 
Yasuo Sasa 
Hokkaido University 
Sapporo 
Eelko Bergsma 
I.T.C. Enschede 
Christiaan Van Welsenes 
University of Nijmegen 
Nijmegen 
Nanno J. Mulder 
I.T.C., Enschede 
Herman Th. Verstappen 
I.T.C., Enschede 
Jacob M. Remeijn 
I.T.C. Enschede 
NORWAY 
Gunnar SkrRmo 
Norwegian Forest Research Institute 
Rs-NLH 
ROUMANIA 
N.C. Oprescu 
Roumanian Committee for Photogrammetry 
Bucharest 
I.S. Zonneveld 
I.T.C., Enschede 
SWEDEN 
L.F. Torbjom Koch 
The Swedish Society of 
Photogrammetry 
Stockholm 
SWITZERLAND 
Ragnar V.A. Thoren 
Swedish Research Institute of 
National Defence 
Lidingo 
Harold Haefner 
University of Zurich 
Zurich