1. Identification of derivatives of deoxyribonucleic acid in humic acid;Anderson;Soil Science,1958
2. Other organic phosphorus compounds;Anderson,1975
3. Properties of protein-bentonite complexes as influenced by equilibration conditions;Armstrong;Soil Science,1964
4. C.A. Bower, 1949. Studies on the forms and availability of soil organic phosphorus. Iowa Agricultural Experiment Station, Research Bulletin 362, pp. 963–996