Menzel, Carl A. <br/><br/>
Method for determining the moisture condition of hardened c-oncrete in terms of relative humidity / by Carl A. Menzel. 

 - Skokie, Illinois : atories, Development Department 
 - 26 p. 
 - Bulletin D4 / Portland Cement Associaiton, Research and Dev-elopment Laboratories, Development Department .
<br/><br/> "Authorized reprint from the copyrighted proceedings of the- American Society of Testing Materials, Philadelphia 3, Pa.- Volume 55, 1955".