TY  - RPRT
TI  - Contributions to economic geology, 1906, Part I, Metals and nonmetals except fuels--Abrasive Materials
AU  - Ralph Arnold
AU  - Robert Anderson
PY  - 1907
DO  - 10.3133/b315o
UR  - https://pubs.usgs.gov/publication/b315O
ID  - b315O
ER  -