Ford, C. L. <br/><br/>
successive determination of manganese, sodium and potassium- in cement by flame photometry / by C. L. Ford. 

 - Skokie, Illinois : atories 
 - 15 p. 
 - Bulletin 104 / Portland Cement Association .
<br/><br/> "Authorized reprint from copyrighted ASTM Bulletin No. 233,- October, 1958".