TY  - BOOK
AU  - Niewidonski S.
TI  - Filter Hand Book
SN  - 0000020573
U1  - 621.81 
PY  - 1989///
CY  - Londan
PB  - Heinaman Newman, Oxford
KW  -  Filter
KW  -  Guide
KW  -  Hand
KW  -  Practical
KW  - Design
KW  - M/c Design,Draw & Engg Draw,Graphy
ER  -