http://www.acq.osd.mil/bmdo/bmdolink/pdf/jn0019.pdf - X band radar
http://www.acq.osd.mil/bmdo/bmdolink/pdf/jn0013.pdf - Early Warning System
http://www.acq.osd.mil/bmdo/bmdolink/pdf/po9902.pdf - BMDO Budgetry History
http://www.acq.osd.mil/bmdo/bmdolink/pdf/jn9905.pdf - NMD Program
http://www.acq.osd.mil/bmdo/bmdolink/pdf/aq9901.pdf - BMD Core Programs
http://www.acq.osd.mil/bmdo/bmdolink/pdf/jn9906.pdf - NMD Program Architecture


http://www.af.mil/news/factsheets/Defense_Support_Program_Satel.html - DSP fact sheet