story image: dark cave with many sequential curtains

[silversurfer]

I am looking for a book or short story I read a long time ago. Earth had frozen, oxygen was frozen on the surface. People had to pass thru many curtains used to keep the air and heat in these deep caves. They had to go to the surface to mine O2 snow to stay alive. What was the name of the book or the author? SilverSurfer.

 

[Taltos]

Is it Fritz Leiber "A Pail of Air" ?

 

[iansales]

Sounds like it to me, too.

 

[Somni]

Me, too, for what it counts.

 

[High Eight]

And me.