IUCN Red List
Concept
IUCN Red List of Threatened Species
2012 · · Choice Reviews Online
Accelerated modern human–induced species losses: Entering the sixth mass extinction
2015 · Gerardo Ceballos, Paul R. Ehrlich, et al. · Science Advances
IUCN Red List of threatened species
2005 · Craig Hilton‐Taylor, Caroline M. Pollock, et al. · Choice Reviews Online