Tuaynun J. Determination of total nitrogen, phosphorus and potassium in organic fertilizer. Master of Science. Department of Chemistry for teacher. Faculty of Science, Khon Kaen University; 2012. Thai
Tuaynun J. Determination of totalnitrogen, phosphorus and potassium in organic fertilizer. Master of Science. Department of Chemistry for teacher. Faculty of Science, Khon Kaen University; 2012. Thai
Tuaynun J. Determination of total.Nitrogen phosphorus and, potassium in organic fertilizer. Master of Science. Department of Chemistry for teacher. Faculty. Of Science Khon Kaen, University; 2012. Thai.