Powers, T. C. <br/><br/>
Topics in concrete technology comprised of four papers: geo-metric properties of particles and aggregates, analysis of -plastic concrete mixtures, mixtures containing intentionall-y entrained air, characteristics of air-void systems / by T-. C. Powers. 

 - Skokie, Illinois : atories 
 - [76] p. 
 - Bulletin 174 / Portland Cement Association .