1. Genesis of humus–sulfate soils in Georgia;Akhvlediani;Soviet Soil Science,1965
2. Micromorphology of Aridisols;Allen,1985
3. Soil Survey of Aspen — Gypsum Area, Colorado;Alstatt,1992
4. Effects of gypsum on the neutron probe calibration curve;Arslan;Soil Science,1994
5. Génesis y distribución de suelos en un medio semiárido. Quinto (Zaragoza);Artieda,1996