Dear Seishi,

There was a Studia Indologica published in Germany in 1955:
Studia Indologica : Festschrift für Willibald Kirfel zur Vollendung seines 70. Lebensjahres / herausgegeben von Otto Spies. Bonn 1955.

It may be a long shot, but if Bapat had a contribution therein and sent out offprints noting his affiliations, it may have become mis-referenced. I once gave the late Paul Ricoeur a review article I had written for
PEW and it was cited in one of his books with the name of the journal given as "Feature Book Review."
These things happen.

best,
Matthew

Matthew Kapstein
Directeur d'études,
Ecole Pratique des Hautes Etudes

Numata Visiting Pro
fessor of Buddhist Studies,
The University of Chicago