Branson, Peter. An introduction to the systems approach using alpha / Peter Branson ; Ian Pritchard & Alison Watts & coordinated by Mike Whittaker. - [s.l.] : Pupil Worksheets, [n.d.] - v, 106 p. : ill. ; 30 cm. Includes appendices. LCCN: 49001786 Subjects--Topical Terms: Electronic Engineering.Electronic systems. Dewey Class. No.: 621.3811 / BRA