Johnson, Wilton.
Cement / Wilton Johnson. - Pittsburgh, PA : Bureau of Mines, 1987. - 28 p.
"Preprint from the 1987 Bureau of Mines Minerals Yearbook"--Cover.
90043027
Mineral industries--Periodicals.--United States
Mines and mineral resources--Periodicals.--United States
Cement industries.
Cement / Wilton Johnson. - Pittsburgh, PA : Bureau of Mines, 1987. - 28 p.
"Preprint from the 1987 Bureau of Mines Minerals Yearbook"--Cover.
90043027
Mineral industries--Periodicals.--United States
Mines and mineral resources--Periodicals.--United States
Cement industries.