usage: /usr/bin/lkbib [-n] [-i fields] [-p database] ... [-t maximum-key-length] key ...
usage: /usr/bin/lkbib {-v | --version}
usage: /usr/bin/lkbib --help

GNU lkbib searches bibliographic databases for references matching
all keywords "key" and writes any references found to the standard
output stream.  It reads databases given by -p options and then
(unless -n is given) a default database.  See the lkbib(1) manual
page.