Sinclair ZX Spectrum A Visual Compendiu: 9780993012938: Amazon.com: Books
S2 E8 - 40 YEARS since the Sinclair ZX81 (and how it indirectly helped give us the M1) | The Constant Geekery Podcast | Podcasts on Audible | Audible.com
The Sinclair ZX Spectrum Turns 40 | Hackaday
The Sinclair ZX Spectrum Turns 40 | Hackaday
Not Only 30 Programs for the Sinclair ZX81 (Retro Reproductions): Reproductions, Retro: 9781789825886: Amazon.com: Books
A Compendium of ZX Spectrum Games - Volume One: Hawken, Kieren: 9781785389979: Amazon.com: Books
Sinclair ZX Spectrum A Visual Compendiu: 9780993012938: Amazon.com: Books