TY  - RPRT
TI  - Monitoring populations of plants and animals
AU  - J.P. Gibbs
AU  - Sam Droege
AU  - P. Eagle
PY  - 1998
DO  - 10.2307/1313297
UR  - https://pubs.usgs.gov/publication/5223396
ID  - 5223396
ER  -