Research ArticleOpen accessIn the keywordsSewage Treatment Plant Sludge: A Source of Potential Microorganism for Citric Acid ProductionParveen Jamal, Md. Zahangir Alam, M. Ramlan et al.American Journal of Applied Sciences, Vol. 2, Issue 8 · 31 Aug 2005 · 8,940 accessesView PDFCite