1. Zoological Ripening of Soils;Bal,1982
2. Zur Mikromorphometrie von Hohlraumen und Aggregaten im Boden;Beckmann,1962
3. Image geometry and rectification;Bernstein,1983
4. Data processing and reprocessing;Billingsley,1983
5. Submicroscopy of Soils and Weathered Rocks,1981