1. Most probable number method for microbial populations;Alexander,1982
2. Oxidation of ammonium to nitrate in a soil column;Ardakani,1974
3. A kinetic study of ammonium and nitrate oxidation in a soil field plot;Ardakani,1974
4. Overview: Artificial Recharge of Ground-water;Asano,1985
5. Wastewater reclamation and reuse;Asano,1991