>Indogermanisches Wörterbuch by Gerhard Köbler.
At a brief glimpse, I find:
(a) the layout unclear
(b) an enormous stress on Greek and Latin, then the Germanic languages. I
can't see much Sanskrit, or Tocharian, or Albanian, or Armenian.
Either I've missed something, or this is a book for people with a particular
use for Latin-Greek-Germanic evidence.
Peter