Google heliostat reflector_design
Hp90 Release Spec Tech07
Teachers workshop 21feb09 arecibo observatory The Arecibo radio telescope 2009 teachers workshop Phil Perillat.
Characterization of the Engineering Test Reactor at the INL for Final Disposition TRTR 2007 J. R. Parry Irradiation Test Programs INL.
The Arecibo radio telescope
