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