IMSLP Forums

I don't see a link to these pieces (also known as Sinfonias or Overtures) on Carl Friedrich Abel's composer page. Yet there is a page for the music:

http://imslp.org/wiki/6_Symphonies,_Op. ... Friedrich)

It's not missing, it's a collection. You'll find it under Abel's "Collections" tab. There are individual pages for the 6 works published as Op.1 under the "Compositons" tab.