== References ==
# {{Category:Hewitt 1855}}<nobiblio force=truebr>#[[Template{{Category:Bib]]Wheeler 1927}}</nobibliobr><HarvardReferences /br>[[Category:Bibliography]]
==Book Series==
<categorytree mode=Pages Depth=1 hideroot=on>Book Series</categorytree>
[[Category:Bibliography]]
<nobiblio force=true>#[[Template:Bib]]</nobiblio>
<!-- <HarvardReferences /> -->