Dahl, L. A. <br/><br/>
Estimation of phase composition of clinker: in the system 3-CaOSiO2-2CaOSi02-3CaO Al2O3-4CaO Al2O3Fe2O3 at clinkering t-emperatures / by L. A. Dahl. 

 - Chicago : Portland Cement Association, Research Laboratory 
 - 43 p. 
 - Bulletin 1 / Portland Cement Association .
<br/><br/> "Reprint from Rock Products, Vols. 41-42, 1938, 1939".