Books:

• Colonies in Space. Heppenheimer, T. A. Stackpole Books, 1977.
• High Frontier: Human Colonies in Space. O'Neill, Gerard. Space Studies Institute Press, 2000.
• The Quest For Water Planets: Interstellar Space Colonization in the 21st Century. Halyard, Raymond J. American Eagle, 1996.
• "The Rationale for Establishing an International Lunar Base". Schrunk, D. G. In Advances in Astronautical Sciences (AAS) series no. 110, Space Development and Cooperation Among All Pacific Basin Countries, 2002.
• Toward Distant Suns. Heppenheimer, T. A. Stackpole Books, 1979.
• Designing Places for People. Deasy, C. M.; Whitney Library of Design, 1985.

Web Sites

• NSS Space Settlement Library
• Space Colony Art from the 1970s
• The Moon Society
• Space Studies Institute Space Art
• The Creation of Free Settlements
• National Space Society Space Settlement Section
• Space Studies Institue
• NASA space settlement mirror site
• Space Settlement
• The Space Frontier Foundation
• P.E.R.M.A.N.E.N.T.
• Wikipedia - Space colonization