libpdl-fit-levmar-perl:

All of the software in levmar-2.1.3 and only the software
therein is copyrighted by Manolis Lourakis and is licensed
here under the terms of the Gnu General Public License
(GPL).  The remainder of the contents of the files in this
package is copyrighted by John Lapeyre and may be
distributed only under the terms of the GPL or the perl
Artistic License.

The full text of the GPL is available on Debian systems in
/usr/share/common-licenses/GPL

The full text of the Artistic Licence is available on Debian systems in
/usr/share/common-licenses/Artistic.

John Lapeyre 2006