TY  - RPRT
TI  - A note on costs of collecting hydrometric flow data in the United States
AU  - W. B. Langbein
AU  - G. E. Harbeck
PY  - 1974
DO  - 10.1080/02626667409493901
UR  - https://pubs.usgs.gov/publication/70247303
ID  - 70247303
ER  -