Brown, C. C. Directory of American cement industries and hand-book for cement users. Municipal engineering Co.
Lua i Stíl Chicago (17ú heag.)Brown, Charles Carroll. Directory of American Cement Industries and Hand-book for Cement Users. Indianapolis New York: Municipal engineering Co.
Lua MLA (8ú heag.)Brown, Charles Carroll. Directory of American Cement Industries and Hand-book for Cement Users. Municipal engineering Co.
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