COMMISSION III 
PROCEEDINGS OF A SYMPOSIUM 
UNIVERSITY COLLEGE LONDON 
9-13 AUGUST 1971 
Commission President; 
Professor E H Thompson OBE, MA, ScD, FRICS 
(University College London) 
Commission Secretary: 
D W Proctor, BSc(Eng), ARICS 
Commission Address 
  
INTERNATIONAL SOCIETY FOR PHOTOGRAMMETRY 
AERIAL TRIANGULATION 
HELD AT 
(Ordnance Survey) 
Department of Photogrammetry & Surveying 
University College London, Gower Street, London WCIE 6BT, England.