TY  - RPRT
TI  - Contributions to economic geology, 1906, Part I, Metals and nonmetals except fuels--Glass-making Materials
AU  - Ernest Francis Burchard
PY  - 1907
DO  - 10.3133/b315k
UR  - https://pubs.usgs.gov/publication/b315K
ID  - b315K
ER  -