REFERENCES 
ANSTIS, A.H. 
"An Automatic Recording Stereocomparator 
The Photograrametric Record, 
Vol. Ill, No. 16, i960. 
HARLEY, I.A. 
"Some Notes on Stereocomparators" 
The Photogrammetric Record, 
Vol. IV, No. 21, 1963. 
HILGER & WATTS Publication CS119/2