ftp.ntua.gr:/mirror/slackware/slackware64-14.2/source/l/gsl/?C=N&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[TXT] slack-desc                                       22-Nov-2013 21:47  898   
[TXT] gsl.SlackBuild                                   16-Oct-2015 01:31  3.8K  
[   ] gsl-2.1.tar.xz                                   12-Nov-2015 02:29  2.1M
Apache/2.2 Server at ftp.ntua.gr Port 80