Foxcroft, G. E. 1924- Electronics : a systems approach to digital electronics / [Books]. G.E. Foxcroft, J.L. Lewis, M.K. Summers. - Harlow : Longman, 1986. - viii,183p. : ill. ; 24cm. Includes index. ISBN: 0582231752 Subjects--Topical Terms: Electronic apparatus and appliances.