TY  - RPRT
TI  - Contributions to economic geology, 1906, Part I, Metals and nonmetals except fuels--Portland, Natural, and Puzzolan Cements
AU  - Ernest Francis Burchard
AU  - Sydney Hobart Ball
PY  - 1907
DO  - 10.3133/b315f
UR  - https://pubs.usgs.gov/publication/b315F
ID  - b315F
ER  -