000			004900000a22001810004500
008			151223t1980 xxu||||| |||| 00| 0 eng d
020			_a0070649286
041			_aeng
080			_a621.374.32 _bT6
942			_cBK
100			_aTokheim, Roger L.
245			_aTheory and problems of digital principles
260			_aNew York _bMcGraw-Hill _c1980
300			_a232p. : ill.
440			_aSchaum's outline series
650			_aELECTRONIC CIRCUITS, COUNTING
650			_aDIGITAL DEVICES
999			_c127327 _d127327