1. Some applications of the new integral sampling method in rock masses;Rocha,1971
2. The analysis of aggregates of orientation data in the earth sciences;Pincus;J. Geol.,1953
3. Rock Slope Engineering;Hoek,1974
4. Structural Methods for Exploration Geologists;Badgley,1959
5. Regional study of jointing in the Comb Ridge-Navajo Mountain area, Arizona and Utah;Hodgson;Bull. Am. Ass. Petrol. Geol.,1961