Public Domain

To the extent possible, the data, code, and documentation here are placed in
the public domain.  No claim of copyright is made by the authors and no
restrictions of any kind placed on the use of the work here.

The original sources of the data are mostly based on published works with
the clear intent of providing data to the general public.  Some of the
datasets have may not have clear statements of copyright or license, but
have been freely available for many years. The work here is a compilation
and reformatting of those datasets.

If you use these resources and wish to cite the original data source, please
see the documentation for more details.
