TY  - RPRT
TI  - Biodiversity: measurement and estimation.
AU  - J L Harper
AU  - D L Hawksworth
PY  - 1994
DO  - 10.1098/rstb.1994.0081
UR  - https://pubmed.ncbi.nlm.nih.gov/7972355/
ID  - 7972355
ER  -