TY  - RPRT
TI  - Contributions to economic geology (short papers and preliminary reports), 1929 : Part I. - Metals and nonmetals except fuels
AU  - Gerald Francis Loughlin
AU  - George Rogers Mansfield
AU  - E. F. Burchard
PY  - 1930
DO  - 10.3133/b811
UR  - https://pubs.usgs.gov/publication/b811
ID  - b811
ER  -