[racket] [Scribble] bibtex @mastersthesis

When I cite a @mastersthesis in bibtex to be cited with scriblib/bibtex, I
get the following error:

Warning: some cross references may be broken due to undefined tags:
 (autobib-date "'#hash((type . \"mastersthesis\") (\"year\" . \"2004\")
(\"title\" . \"Starkiller: A Static Type Inferencer and Compiler for
Python\") (\"month\" . \"May\") (\"school\" . \"Massachusetts Institute of
Technology\") (\"author\" . \"Michael Salib\"))")

Bib entry looks like:

@mastersthesis{salib:starkiller,
  author = "Michael Salib",
  title = "Starkiller: A Static Type Inferencer and Compiler for Python",
  school = "Massachusetts Institute of Technology",
  month = "May",
  year = 2004
}


And it appears in the rendered output as

[image: Inline image 1]

All the cites I have that are @inproceedings or @misc typeset and link
fine.  The @mastersthesis entry works if I just use plain old latex/bibtex
with \cite{}.

Is there a way for me to define what this should look like myself?  I can
maybe hack something that looks OK with @misc, but if there's an easy fix
it would be nice to know.  Is there a place in the docs I should have
looked to find that this wasn't supported?
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