Effects of heavy metal toxicity on the biological transformation of phosphorus in soil / Nazmun Nahar. [ Ph. D Thesis]. Nahar, Nazmun. Soil pollution. Toxic chemicals. 363.7396 NAE Thesis (Ph.D.)--Department of Soil, Water & Environment, University of Dhaka, Session: 2013-14. Includes bibliographical references. Dhaka : University of Dhaka, 2016. 2016. 2016 Text 176 p. in various pagings : eng