00311    a2200109   4500020001500000082001600015100002200031245004900053260004400102300002000146650003500166  a0195178637  a621.38bFOR  aFortney, Llory R.  aPrinciples of electronics analog and digital  aNew YorkbOxford universityc1987g1987  axix,632p.c24cm  aEmployee health safety welfare