Stacking up on standard works

Dear Cybalist!


I have noticed that my postings in the etymology department seem to overly rely on a few good standard works and be lacking in others. Could y'all advise me on which standard works on etymology it would be a good idea to supplement one's OCR library with, within

Baltic
Slavic (I've got Vasmer)
Celtic (is Matasovic really the best there is?
Indic
Iranian
Italic (other than Ernout-Meillet!)
Anatolian

Thank you in advance


Torsten