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| Type | Company |
| Location | United States (North America) |
| Industry | Nonmetallic Minerals Industry |
| Holdings | Newspaper clippings: 1950-1986 Annual reports: 1959-1961,1963-1967 |
| includes | General Portland Cement Co – 1970 |
| URI | https://pm20.zbw.eu/folder/co/058415 |
| ID | co/058415 |