Information surces on the cement and concrete industry - New York United Naitons USA 1977 - "xii, 91p." cm. - Its gudies to informaiton sources.2 . Bib p. 88-9 Standard No.: 107577 Source: Reference Collections Subjects--Topical Terms: Library Sicence Dewey Class. No.: "24(X9(D35)g, L7/UN"