Sources:
Zubrin, Robert. The Case for Mars. New York, NY. The Free Press,
1996.
Ronald Greely and Peggy Thomas. Mars Landing Site Catalog. http://cmex.arc.nasa.gov/MarsTools/Mars_Cat/Mars_Cat.html.
January 21, 1999.
Compton's Encyclopedia. Chicago, IL. 1992
Encarta 98. CD-ROM. 1998.
Brambilla, Roberto and Long, Granni. Learning
from Baltimore. Institute for Environmental Action. 1979.
"1990 US Census Data". Census Lookup (1.4a).
http://www.census.gov. (11 Feb, 1999).
Smith, Beth. "Who's Who in Residential Architecture".
Sun Magazine. 1994.