William "Bill" Back: an incisive geochemist and a great mentor.
Baedecker
Mary Jo
MJ
U.S. Geological Survey, Reston, VA 20192, USA. mjbaedec@usgs.gov
Wood
Warren W
WW
D002621:Chemistry; D004463:Ecology; D049673:History, 20th Century; D049674:History, 21st Century; D011173:Portraits as Topic; D014872:Water Movements