We have prepared author/editor and reviewer indices, plus tables of contents listings, for two journals:
Our defunct Indo-European Typology project created author and keyword indices to a number of publications based on two typological principles: Language Systems, and Word Order. However, lack of interest & resources led to this project being abandoned, and these indices have since been retired.
Separately, we have what we believe to be a complete list of publications by the late Winfred P. Lehmann, renowned Indo-European scholar and founder of the Linguistics Research Center. Several of his books are available on this website; see our Books Online series: Indo-European Languages and Historical Linguistics.