Sinclair ZX81 Software Catalogue + Leaflet

Sinclair ZX81 Software Catalogue

Programming for Real Application Randle Hurley Sinclair ZX81 Book

Sinclair ZX81 Literature flyer + Software Catalogue

Sinclair ZX81 Computer Book: The ZX81 Pocket Book - Trevor Toms / Phipps Assoc

Educare's 50 programs for 1k ZX81 Sinclair ZX81 Book CL01

Vintage Sinclair User Magazine #11 June 1984 - ZX Spectrum ZX81

Sinclair ZX81 Computer Book: The ZX81 Companion - Bob Maunder, Linsac, 1981