TY  - BOOK
AU  - Tokheim,Roger L.
TI  - Schaum's outline of theory and problems of digital principles / 
T2  - Schaum's outline series   
SN  - 0070650500   
PY  - 1994///.
CY  - New York
PB  - McGraw-Hill, 
KW  - Digital electronics
N1  - Includes index
ER  -