TY  - BOOK
AU  - Schilling,Charles Belove/Harry Schachter/DonaldL
TI  - Digital and analog systems, circuits, and devices : an introduction 
PY  - 1973///
CY  - Singapore
PB  - McGraw-Hill
UR  - http://www.amazon.com/exec/obidos/ASIN/B000OEXTEG/chopaconline-20
ER  -