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Zakaria, Z., Mohamed, A.R., Mohd Salleh, N.H. and Abu Mansor, S.N. 2013. Total Nitorgen Content from Earthworm (Eisenia Foetida) Using The Kjeldahl Method. IIUM Engineering Journal. 14, 1 (Mar. 2013). DOI:https://doi.org/10.31436/iiumej.v14i1.315.