TY  - RPRT
TI  - GRA prospectus: optimizing design and management of protected areas
AU  - Richard Bernknopf
AU  - David Halsing
PY  - 2001
DO  - 10.3133/ofr01404
UR  - https://pubs.usgs.gov/publication/ofr01404
ID  - ofr01404
ER  -