Project : Permanent human outposts on the Moon and Mars published 18 Dec. 2019 on Kickstarter
https://www.kickstarter.com/projects/pnn/permanent-human-outposts-on-the-moon-and-on-mars?ref=project_build#
https://www.kickstarter.com/projects/pnn/permanent-human-outposts-on-the-moon-and-on-mars?ref=project_build#