A Shortcut Through Adventureland Volume 2, Zork I
<https://archive.org/details/a-shortcut-through-adventureland-vol-2>

Conquering Adventure Games, Chapter 5: Zork I
<https://archive.org/details/conquering-adventure-games>

Infocom Documentation Project
<http://infodoc.plover.net/>

Zork Maps
<http://blog.zarfhome.com/2023/02/a-treasury-of-zork-maps.html>