Some aspects of testing for frost resistance....... 

 - Chicago, Illinois : atories. 
 - 10 p. 
 - Bulletin; 79 / Portland Cement Association. .
<br/><br/> "Comprised of two papers: Non-destructive tests for deterio-ration of concrete specimens subjected to frost action / by- George J. Verbeck.-- Notes on the effect of maximum size o-f aggregate on tests for frost resistance / by Paul Klieger