TY  - RPRT
TI  - Drying shrinkage of concrete masonry units determined by different methods 
AU  - Bryson, J O
AU  - Watstein, D
PY  - 1959
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS RPT 6499
DO  - 10.6028/NBS.RPT.6499
ER  -