Zelda 1 reference information:
http://redcandle.us/Main_Page - This is more a basic Zelda information page that shows insight into the game, including enemy drops, how to screen scroll and block clip, etc.
https://sites.google.com/site/zeldarandomizer/ - The randomizer itself (also has good information on guarantees, etc)
https://www.sites.google.com/site/zeldaanypercents/zelda-1-randomizer - A lot of other good information to help assist in learning the details that help with randomizer (also has the same for other games and randomizers as well) http://questwizard.net/zhelper - A link to a tracker program for Zelda 1