SALPEKAR (Aaradhana) Encyclopaedia of ecology and environment. V9 - New Delhi Bharatiya Khadi Gramodyog Vikas Abhikaran 2006 - 340 - 9 . ISBN: 81 89775 00 6 Subjects--Topical Terms: V9Research Methodology Systems Analysisofenvironment.Encyclopaediaecologyand Dewey Class. No.: 574.5 SALE