TY  - RPRT
TI  - Properties of some lightweight-aggregate concretes with and without an air-entraining admixture 
AU  - Petersen, Perry H
PY  - 1948
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS BMS 112
DO  - 10.6028/NBS.BMS.112
ER  -