When I encounter a footnote citing an author, I do a basic search in the resource for the author's name in order to determine to which book reference is made. In reading
Prosic, Tamara. Development and Symbolism of Passover. London; New York: T&T Clark, 2004.
I encountered a footnote citing Gaster (Theodor, presumably) and ran a search but came up dry. Usually I run my searches with all lower case, but, when I found nothing, I changed to normal upper case for the first letter of the name and still found nothing. Using the 4.2a SR-1 release downloaded today. This is possibly an indexing problem since indexing is still in progress. Will report when concluded.