Teletype Center of the NASCOM network, at NASA Goddard
Corliss, William R.
<a rel="nofollow" class="external free" href="http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19750002909.pdf">http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19750002909.pdf</a>, pg. 281