[GSLL-devel] Physics-constants library?

I did not find a library with physics constants on cliki or quicklisp. There is one available from within GSLL, but loading GSLL just for physics constants is an overkill. Are there any other ones? I have one of my own (somewhat incomplete) that works for me, and I can clean it up and push it to quicklisp if nothing meaningful is out there. Mirko