T Torikai & T Torikai, April 14, 1993, "Space Tourism and Transportation", A comment presented at
Space Tourism Study Conference held on April 14, 1993. Edited and translated into English from taped transcript originally in Japanese. Originally published in the
Journal of Space Technology and Science, Vol.9 No.1
'93 spring, pp.19-20.
Also downloadable from http://www.spacefuture.com/archive/space tourism and transportation.shtml