00489nam a22001457a 4500 0 0 0 0 RIU RIU 2012-02-06 Vanguard Publication 0 004.165 CHA 0307 2012-02-06 00:00:00 1 BK weedout 106 106 9780273020295 (pbk) 0273020293 004.165 CHA Chapple, Jonathan I wish i knew... about the spectrum and ZX81 London Pitman Publishing Ltd. 1983 xii, 80 p. : ill. (col.) ; 25 cm. Computer science Microcomputer systems Sinclair ZX81 Computer literature Computer graphics Notation FC BK