Dahl, L. A. <br/><br/>
New study on reactions in burning cement raw materials / by- L. A. Dahl. 

 - Chicago : atories 
 - 25 p. 
 - Bulletin 59 / Portland Cement Association .
<br/><br/> "Authorized reprint from copyrighted Rock Products, May, Ju-ne and July, 1955".