TY  - RPRT
TI  - Group inverse sampling: An economical approach to inverse sampling
AU  - Bardia Panahbehagh
AU  - David R. Smith
PY  - 2017
DO  - 10.1002/env.2459
UR  - https://pubs.usgs.gov/publication/70212319
ID  - 70212319
ER  -