Coal areas in the United States showing bituminous lignite, sub bituminous, anthracite
name: label: Collection Creator
content: American Petroleum Institute.
setName: label: See more items in
content: American Petroleum Institute Photograph and Film Collection
label: See more items in
content: American Petroleum Institute Photograph and Film Collection / Series 2: Modern Photographs, 1960s-1980s
unitdate: label: Date
content: undated
container: label: Container
content: Box 32, Folder 72
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials