[cctalk] Late '70s DEC manual covers [niche!]

Folks, During lockdown I was having some fun redrawing old DEC manual covers with Inkscape, specifically terminal and printer manuals from the late 1970s. I've attached a montage of four that I printed out so I could stick it on the wall. I'm aware I may be the only person, even here, who finds them attractively simple and coloured in such a definably 1970s way. Some of these designs were used on several manuals, but I'd like to know if you know of any other designs that follow this pattern that I could add to the collection? The VT102 User Guide has different colours, so it looks out of place. A copy of the LA34 User Guide is winging its way to me as we speak. For an infinite number of bonus points, does anyone have any clue who might have designed these? Paul