Philip, C.B. "Comments on the classification of the order Rickettsiales." Can. J. Microbiol. (1956) 2:261-270.
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(2016). GBIF Backbone Taxonomy. GBIF Secretariat. Checklist Dataset http://doi.org/10.15468/39omei accessed via GBIF.org on 2017-04-23.
This record was last modified on Feb 14, 2017.