The Infocom Gallery: Planetfall - High-quality scans of gray box packaging, manual, letters, ID card, and postcards. - http://infocom.elsewhere.org/gallery/planetfall/planetfall.html
Infocom Documentation Project - PDF file of scanned original game manual. - http://infodoc.plover.net/manuals/planetfa.pdf
Infocom Games: Planetfall - Box art and description, specifications, and sample transcript. - http://www.infocom-if.org/games/planetfall/planetfall.html
Matthew Murray's Capsule Review - "Though certain no heavy-duty mental challenge, if you are looking for a somewhat interesting science-fiction game, and have a fair amount of patience, Planetfall might just be worth your time." - http://www.matthewmurray.net/Reviews/ComputerGames/Planetfall.html
MobyGames: Planetfall - User reviews, credits, box image, trivia, and other information. - http://www.mobygames.com/game/sheet/gameId,51/
Adventure Collective Review - Reviewed by John Alston Campbell. "Planetfall is a good playground for beginners to learn some of the basics of adventure gaming." - http://www.adventurecollective.com/reviews/planetfall.htm
Infocom Homepage: Planetfall - Description, box art, release information, game statistics, and packaging details. - http://www.csd.uwo.ca/Infocom/planetfall.html