The atari-small.bdf is from
http://hea-www.harvard.edu/~fine/Tech/x11fonts.html
 
The license is like this
 
The following fonts are available for free, to use as you please.
The minimal license is included in the header of each font.
  
Copyright (c) 1999, Thomas A. Fine

License to copy, modify, and distribute for both commercial and
non-commercial use is herby granted, provided this notice
is preserved.

Email to my last name at head.cfa.harvard.edu
http://hea-www.harvard.edu/~fine/

Produced with bdfedit, a tcl/tk font editing program
written by Thomas A. Fine

The atari-small.sfd is a fontforge native font created by me.
Copyright (C) 2007-2016 Gurkan Myczko
Released under the same license as the original font.