bhl_authorsearch        Return a list of authors that match (fully or
                        partially) the specified search string.
bhl_bioherlib           Search BHL across many API methods.
bhl_booksearch          Search for titles and items in BHL.
bhl_getauthortitles     Return a list of titles associated with a given
                        BHL author identifier.
bhl_getcollections      Get a list of collections which are used to
                        group titles and items. A single collection may
                        contain either titles or items, but not both.
bhl_getitembyidentifier
                        Find and return metadata about an item or items
                        that match a specific identifier.
bhl_getitemmetadata     Return metadata about an item.
bhl_getitempages        Return a list of an item's pages.
bhl_getlanguages        Get a list of languages in which materials in
                        BHL have been written.
bhl_getpagemetadata     Return metadata about a page.
bhl_getpagenames        Return a list of names that appear on a page.
bhl_getpageocrtext      Return the OCR-generated text of a page.
bhl_getsubjecttitles    Return a list of titles associated with a
                        subject.
bhl_gettitlebibTex      Return a citation for a title, using the BibTeX
                        format.
bhl_gettitlebyidentifier
                        Find and return metadata about a title or
                        titles that match a specific identifier.
bhl_gettitleendNote     Return a citation for a title, using the
                        EndNote format.
bhl_gettitleitems       Return a list of a title's items (books).
bhl_gettitlemetadata    Return metadata about a title. You may choose
                        to include a list of the items (books)
                        associated with the title.
bhl_getunpublisheditems
                        Return a list of the identifiers of all
                        unpublished items.
bhl_getunpublishedtitles
                        Return a list of the identifiers of all
                        unpublished titles.
bhl_openurl             Not sure how this differs from their other
                        API...
bhl_subjectsearch       Return a list of subjects that match (fully or
                        partially) the specified search string.
bhl_titlesearchsimple   Perform a simple title search.
query2message           Internal function to convert API query to
                        message printed in the console.
rbhl-package            R interface to the Biodiversity Heritage
                        Library API.
rbhlmethods             Data.frame of all the BHL API methods.
