JBIS Vol 65, No 06 (June 2012)
Editorial
World Ships - The Long Journey to the Stars
Communication with World Ships - Building the Diasporanet
P. Galea
The Enzmann Starship: History & Engineering Appraisal
A. Crowl, K.F. Long and R. Obousy
The Long-Term Growth Prospects for Planetary and Space Colonies
Stephen Ashworth
