TY  - RPRT
TI  - Shrinkage and creep in prestressed concrete 
AU  - Petersen, Perry H
AU  - Watstein, David
PY  - 1968
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS BSS 13
DO  - 10.6028/NBS.BSS.13
ER  -