TY  - RPRT
TI  - Mineral resources of the United States, 1922: Part II - Nonmetals
AU  - Gerald Francis Loughlin
AU  - Frank James Katz
PY  - 1925
DO  - 10.3133/70175848
UR  - https://pubs.usgs.gov/publication/70175848
ID  - 70175848
ER  -