TY  - BOOK
AU  - Libby, James R,
TI  - Modern prestressed concrete: Design principles and construction methods 
SN  - 0442319231
AV  - TA683.9 L48 1990
PY  - 1990///
CY  - New York
PB  - Van Nostrand Reinhold
KW  - Construcciones de concreto pretensado
ER  -