Verbeck, George J. <br/><br/>
Osmotic studies and hypotesis concerning alkali-aggregate r-eaction / by George J. Verbeck and Charles Gramlich. 

 - Chicago : atories 
 - [25] p. 
 - Bulletin 57 / Portland Cement Association .
<br/><br/> "Authorized reprint from Proceedings, American Society for - Testing Materials Vol. 55, p. 1110 (1955)".