TY  - RPRT
TI  - A simple device for measuring differences in hydraulic head between surface water and shallow ground water
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 2000
DO  - 10.3133/fs07700
UR  - https://pubs.usgs.gov/publication/fs07700
ID  - fs07700
ER  -