00462naa a2200157 a 450000100080000000500110000800800410001910000190006024500770007926000090015665000160016570000160018170000190019770000200021677300680023610303802009-11-25 2006 bl --- 0-- u #d1 aNOVOTNY, E. H. aEffect of residual vanadyl on the spectroscopic analysis of humic acids. c2006 ahumic acids1 aKNICKER, H.1 aCOLNAGO, L. A.1 aMARTIN-NETO, L. tOrganic geochemistry, Oxfordgv. 37, n. 11, p. 1562-1572, 2006.