Sorry, the netlib links listed below seem to have vanished.
However, the catalogue should still be available on 
<A HREF=" http://www.research.att.com/~njas/index.html">NJA Sloane's homepage</A>

<UL>
<LI><A HREF="ftp://netlib.att.com/netlib/att/math/index.html.Z">ftp://netlib.att.com/netlib/att/math/index.html.Z</A>
<LI><A HREF="ftp://netlib.att.com/netlib/att/math/sloane/index.html.Z">ftp://netlib.att.com/netlib/att/math/sloane/index.html.Z</A>
<LI><A HREF="ftp://netlib.att.com/netlib/att/math/sloane/doc/index.html.Z">ftp://netlib.att.com/netlib/att/math/sloane/doc/index.html.Z</A>
<LI><A HREF="ftp://netlib.att.com/netlib/att/math/sloane/packings/index.html.Z">ftp://netlib.att.com/netlib/att/math/sloane/packings/index.html.Z</A>
<LI><A HREF="ftp://netlib.att.com/netlib/att/math/sloane/packings/dim4/index.html.Z">ftp://netlib.att.com/netlib/att/math/sloane/packings/dim4/index.html.Z</A>
</UL>

Similar addresses for coverings (vs. packings) etc, etc.
This will give you a screen of short descriptions of all the items
available.  Clicking on one gives you the document, which
can then be saved in a file.
The files you receive will be compressed, and end with .Z, e.g. ljc.ps.Z .
You may need to do  uncompress ljc.ps.Z  to uncompress them.