TY  - RPRT
TI  - Sampling design for spatially distributed hydrogeologic and environmental processes
AU  - G. Christakos
AU  - Ricardo A. Olea
PY  - 1992
DO  - 10.1016/0309-1708(92)90008-p
UR  - https://pubs.usgs.gov/publication/70016924
ID  - 70016924
ER  -