1. Wheat hay grown with sludge;Day;Bio–Cycle,1987
2. Effects of sewage sludge on yield and quality of wheat grain and straw in an arid environment;Day;Desert Plants,1987
3. Wastewater chemical affects plant growth;Katterman;Water & Wastes Engineering,1980
4. Plant growth factors in municipal wastewater;Katterman;Bio-Cycle,1987
5. Previous sludge addition effects on N mineralization in freshly amended soil;Lindermann;Soil Science Society of America Journal,1988