1. Heights from parallax measurements;Thompson;Photogramm. Rec.,1954
2. Corrections to x-parallaxes;Thompson;Proc. 23rd natn. Conf. ACM,1968
3. Elementary Photogrammetry;Corne,1963
4. Application of aerial photos in engineering geomorphotogical mapping for highway engineering design and maintenance;Farhan;Proc. ASP-ACSM A. Mtg.,1980
5. Parallax heighting: an aid in haffir digging;Sudan Rural Water Corp. Report,1982