1. Some methods for assessing pesticide effects on non-target microorganisms and their activities;Anderson,1978
2. Studies on the use of urea as fertilizer for tea in Ceylon. 2. Urease activity in tea soils;Bhavanandan;Tea Q.,1970
3. Concerning the location and persistence of soil urease;Burns;Soil Sci. Soc. Amer. Proc.,1972
4. Fertilizers in 2000 A.D. Phosphorus in agriculture. International Superphosphate and Compound Manufacturers Association Paris;Cooke;Bull. Doc. No.,1969
5. A rapid and precise method for the determination of urea;Fawcett;J. Clin. Path.,1960