TY  - BOOK
AU  - Zappe, R. W.
TI  - Valve Selection Handbook 
SN  - 0872018636
U1  - 621.8402 
PY  - 1991///
CY  - Houston : 
PB  - Gulf Publishing Company, 
KW  - Valves Handbooks Manuals
N1  - NY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/0-87201-863-6.pdf
ER  -