1. GIPSY, General Information Processing System: Application description;Addison;Univ. Okla. Inf. Sci. Ser., Monogr.,1969
2. Mathematical problems in geology;Agterberg,1971
3. Geomap - A data system for geological mapping;Berner,1972
4. A national system for storage and retrieval of geological data in Canada;Brisbin;Nat. Adv. Comm. Res. Geol. Sci.,1967
5. Computer-based geological data systems — An emerging basis for international communication;Burk,1971