TY  - BOOK
AU  - Allum, J. A. E.
TI  -  Photogeology and regional mapping
U1  - 550 
PY  - 1966///
CY  - Oxford
PB  - Pergamon
KW  - Steroscopy
KW  - Difference in parallax
KW  - Adjustment of stereoscopes
ER  -