some of the discographical treasures I could find. Thanks to all compilers! I excluded CD-only discographies, everything too private (my-collection-sites) and most of those focussing mainly on CDs (giving the dates of an earlier LP only when not reissued on CD).
Beethoven op111 an annotated list of recordings / from here you will find many more interesting sites with lists of recordings (rather than discographies) of single works
Da Ponte/ Mozart: Così fan tutte a web- essay annotating each number of my favorite opera, offering a shift of perspective (towards theatre) with unforseen results. (in German). - Listed here for no other reason than me having written it taking a break from records.