Yesterday I came across a site about the World Cup in Argentina in
1978. The site is in Spanish, so I had some troubles understanding,
but with a little help from Free Translation
(http://www.freetranslation.com), I managed to get a basic
understanding of what it said. There is loads of information and
pictures, so I can really recommend the site, which is located at
http://www.geocities.com/mundial_78/ (it's not very obvious, but if
you click on the score-board where it says "Argentina Mundial '78", a
menu will pop up, and you can start exploring the site!)

Cheers!
Johan