Powers, T. C. <br/><br/>
Resistance to weathering: freezing and thawing / by T. C. P-owers. 

 - Chicago : atories 
 - [12] p. 
 - Bulletin 64 / Portland Cement Association .
<br/><br/> "Authorized reprint from copyrighted Significance of tests - and properties of concrete and concrete aggregates special- Technical Publication No. 169, published by American Socie-ty for Testing Materials 1956".