IYENGAR, SS, MARTENS, DC, MILLER, WP. (1981). DETERMINATION OF COPPER AND ZINC IN SOIL EXTRACTS BY ATOMIC-ABSORPTION SPECTROPHOTOMETRY USING APDC-MIBK SOLVENT-EXTRACTION
.
SOIL SCIENCE, 131(2), 95-99. 10.1097/00010694-198102000-00005
IYENGAR, SS, MARTENS, DC, MILLER, WP. (1981). DETERMINATION OF COPPER AND ZINC IN SOIL EXTRACTS BY ATOMIC-ABSORPTION SPECTROPHOTOMETRY USING APDC-MIBK SOLVENT-EXTRACTION
. SOIL SCIENCE, 131(2), 95-99. 10.1097/00010694-198102000-00005