TY  - RPRT
TI  - Papers on the conservation of mineral resources (reprinted from report of the National Conservation Commission, February, 1909)
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1909
DO  - 10.3133/b394
UR  - https://pubs.usgs.gov/publication/b394
ID  - b394
ER  -