TY  - RPRT
TI  - A wireline piston core barrel for sampling cohesionless sand and gravel below the water table
AU  - Michael M. Zapico
AU  - Samuel Vales
AU  - John A. Cherry
PY  - 2007
DO  - 10.1111/j.1745-6592.1987.tb01077.x
UR  - https://pubs.usgs.gov/publication/70185547
ID  - 70185547
ER  -