TY  - RPRT
TI  - Preliminary report on the operations of the coal-testing plant of the United States Geological Survey at the Louisiana Purchase Exposition, St. Louis, Missouri, 1904
AU  - Edward Wheeler Parker
AU  - Joseph A. Holmes
AU  - Marius R. Campbell
PY  - 1905
DO  - 10.3133/b261
UR  - https://pubs.usgs.gov/publication/b261
ID  - b261
ER  -