TY  - RPRT
TI  - Proceedings of the Fourth national conference, Water Resources Division, U. S. Geological Survey, Ocean City, Maryland, October 18-23, 1981
PY  - 1983
DO  - 10.3133/ofr83126
UR  - https://pubs.usgs.gov/publication/ofr83126
ID  - ofr83126
ER  -