TY  - RPRT
TI  - Pumping tests in nonuniform aquifers - The radially symmetric case
AU  - J.J. Butler
PY  - 1988
DO  - 10.1016/0022-1694(88)90025-x
UR  - https://pubs.usgs.gov/publication/70013670
ID  - 70013670
ER  -