TY  - RPRT
TI  - Population diversity: its extent and extinction.
AU  - J B Hughes
AU  - G C Daily
AU  - P R Ehrlich
PY  - 1997
DO  - 10.1126/science.278.5338.689
UR  - https://pubmed.ncbi.nlm.nih.gov/9381179/
ID  - 9381179
ER  -