Sikora, F.J., P.S. Howe, L.E. Hill, D.C. Reid, D.E. Harover
2005. Comparison of Colorimetric and ICP Determination of Phosphorus in Mehlich3 Soil Extracts
Commun. Soil Sci. and Plant Anal. http://taylorandfrancis.metapress.com/(0wdfm555btpnwu45hey40k45)/app/home/contribution.asp?referrer=parent&backto=issue,
Authors: Frank Sikora