TY  - BOOK
AU  - Johnson,Wilton
ED  - United States.
TI  - Cement
PY  - 1987///
CY  - Pittsburgh, PA
PB  - Bureau of Mines
KW  - Mineral industries
KW  - United States
KW  - Periodicals
KW  - Mines and mineral resources
KW  - Cement industries
N1  - "Preprint from the 1987 Bureau of Mines Minerals Yearbook"--Cover
ER  -