I'm trying to recall an SF story that was serialized in Analog magazine in the 1960s. Aliens invaded Earth by using a gas that made almost everyone fall asleep. A few individuals were either immune or in a protected environment. One of these was a man who had lost one or both legs. Normally he used robotic legs, but for some reason they were taken away. He may have been in a prison. Together, the few humans left awake somehow defeat the invasion.
I'm not sure if this story was ever published in book form. I read in Analog.
If anyone can point me in the right direction, that would be wonderful. Thanks!