HORN, DELTON T. 49EASY ELECTRONIC PROJECTS FOR THE 556 DUAL TIMER/ D.T. HORN. - BLUE RIDGE SUMMIT, PA.: TAB BOOKS 1991 - 177 P. 25 CM. INCLUYE INDICE. Subjects--Topical Terms: 1.MULTIVIBRADORES. Dewey Class. No.: 621.381 H67