lookbib - search bibliographic databases
lookbib [ -v ] [ -istring ] [ -tn ]
  filename...
It is possible to have whitespace between a command line option
    and its parameter.
lookbib prints a prompt on the standard error (unless the standard input
  is not a terminal), reads from the standard input a line containing a set of
  keywords, searches the bibliographic databases filename... for
  references containing those keywords, prints any references found on the
  standard output, and repeats this process until the end of input. For each
  database filename to be searched, if an index filename.i
  created by indxbib(1) exists, then it will be searched instead; each
  index can cover multiple databases.
  - -v
- Print the version number.
- -istring
- When searching files for which no index exists, ignore the contents of
      fields whose names are in string.
- -tn
- Only require the first n characters of keys to be given. Initially
      n is 6.
refer(1), lkbib(1), indxbib(1)