The manufacture and utilization of portland cement :  report of the interregional seminar held at Holte, Denmark, 7-20 May, 1972. 

 - New York :  United Nations Industrial Development Organization ,  1972 
 - 26p. ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cement industry
<br/><br/><label>Dewey Class. No.: </label>691.5  / UNIDO