TY  - BOOK
AU  - Sheahan, Desmond F. ,ed.
TI  - Modern crystal and  mechanical filters
SN  - 0-471-03237-9
U1  - 621.3815324 
PY  - 1977///
CY  - New York
PB  - IEEE  Press
KW  - Crystal
KW  - Filters
N1  - Includes index
ER  -