TY  - RPRT
TI  - Definitions of components of the Water Data Sources Directory maintained by the National Water Data Exchange
AU  - William A. Knecht
AU  - Melvin D. Edwards
PY  - 1978
DO  - 10.3133/ofr77775
UR  - https://pubs.usgs.gov/publication/ofr77775
ID  - ofr77775
ER  -