TY - GEN AU - AU - Porter, Keith S., ed. TI - Nitrogen and phosphorus: Food production, waste and the environment:A report of an interdisciplinary research projects SN - 0250401118 PY - 1975/// CY - Michigan PB - Ann Arbor Science Publishers KW - Chemical Pollution KW - Nitrogen KW - Phosphorus KW - Food Production KW - Waste KW - Environment ER -