Sinclair ZX Spectrum A Visual Compendiu: 9780993012938: Amazon.com: Books
3D model Spectrum zx81 VR / AR / low-poly | CGTrader
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