Free STL file Sinclair ZX81 case・3D print model to download・Cults
Inside the Sinclair ZX81 - by Paul Lefebvre
81 hires games for the 1K ZX81: Koelman, Johan "Dr Beep": 9798392496495: 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