A missing link in the historical development of hydrogeology.
Stephens
Daniel B
DB
Daniel B. Stephens & Associates Inc., 6020 Academy Rd. NE, Suite 100, Albuquerque, NM 87109-3315, USA.
Ankeny
Mark D
MD
D004784:Environmental Monitoring; D005844:Geology / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D014872:Water Movements; D014881:Water Supply / Q000266:history*