Free PDFs of every Bulletin index from 1961-1988 can be downloaded here.
Bulletin indexes were published annually by the ERA from 1961 through 1988. The 1958-1961 index covered four years; indexes for 1962-1963 through 1978-1979 covered two years each. Thanks to the heroic scanning work of Jeff Erlitz, we have been able to add free downloadable copies of every one of these invaluable volumes.