[R-390] Where did Julian Creek receivers come from?

[jcoward5452 at aol.com]

Several years ago there was an article in Air and Space magazine about life in an underground missile silo.The pictures were all artist's conceptual paintings,no photos.What caught my eye though was the rendering of floor to ceiling racks of radios with the same panel layout as the R-390 and -390A.Lots of them.I can imagine each radio tuned to a different HF comm channel and aslo a completely redundant back up.
 Just wondering how many silos there were and how many radios in each one.
Jay KE6PPF