TY  - BOOK
AU  - ZIMMERMAN L. HART G. CRONTRACTORS
TI  - VALVE ENGINEERING A PRACTICAL APPROACH FOR OWNERS DEDIGNERS AND CONTRACTORS
SN  - NULL
U1  - 690.013 /ZIM/HAR 
PY  - 1988///
CY  - NULL
PB  - C.B.S
KW  - NULL
ER  -