The SPECTRUM package may be picked up on the web at http://www.phys.appstate.edu/spectrum/spectrum.html. Be certain to check this site periodically to see if a new version has been released. Please also consider registering your use of SPECTRUM on that website.
The author of this document and SPECTRUM, Richard Gray, may be contacted
at the following address
Department of Physics and Astronomy
Appalachian State University
Boone, NC 28608
grayro@appstate.edu
If you use SPECTRUM in your publications, please reference it by the paper Gray & Corbally (1994) and, if possible, by including the URL in a footnote.