David; et al. An Ecoregion-Based Approach to Protecting Half the Terrestrial Realm. BioScience. June 2017, 67 (6): 534–545. PMC 5451287 . PMID 28608869. doi:10
David; et al. An Ecoregion-Based Approach to Protecting Half the Terrestrial Realm. BioScience. 2017, 67 (6): 534–545; Supplemental material 2 table S1b. PMC 5451287
David; et al. An Ecoregion-Based Approach to Protecting Half the Terrestrial Realm. BioScience. June 2017, 67 (6): 534–545. PMC 5451287 . PMID 28608869. doi:10