8. References:
http://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.htmlhttp://en.wikipedia.org/wiki/Arecibo_Radio_Telescope
http://en.wikipedia.org/wiki/Daedalus_crater
http://www.lunarrepublic.com/atlas/index.shtml
http://findarticles.com/p/articles/mi_m1134/is_3_111/ai_84545895 http://www.belmont.k12.ca.us/ralston/programs/itech/SpaceSettlement/
Contest/Results/2004/winner/html%20only/Chapter%20II.htm
http://deepspace.jpl.nasa.gov/dsndocs/810-005/201/201.pdf
http://www.stanford.edu/class/ee379b/class_reader/jpl1.pdf
http://www.ras.ucalgary.ca/grad_project_1996/frontend.html
http://www.propagation.gatech.edu/ECE6390/project/Fall2005/chrislee/index.html