Results: 1 - 3 of 3
Nov 30, 2003
Geo-Note
… returned a maximum lead (Pb) concentration of 246 parts per … The best zinc (Zn) concentration of 75 ppm came from … (Mo) up to 56.8 ppm; the concentration of these elements is …
Dec 31, 1978
Bulletin
Oct 16, 2005
Map
… use of symbols and accompanying concentration isopleth maps, the …