TY  - BOOK
AU  - Sheahan,Desmond F.
AU  - Johnson,Robert A.
ED  - Institute of Electrical and Electronics Engineers (IEEE).
TI  - Modern crystal and mechanical filters
SN  - 0471032379
PY  - 1977///
CY  - New York
PB  - IEEE Press
KW  - Electric filters, Crystal
KW  - Mechanical filters (Electrical engineering)
KW  - Electric circuits
ER  -