TY  - RPRT
TI  - Internal and external scope in willingness-to-pay estimates for threatened and endangered wildlife
AU  - K.L. Giraud
AU  - J.B. Loomis
AU  - R.L. Johnson
PY  - 1999
DO  - 10.1006/jema.1999.0277
UR  - https://pubs.usgs.gov/publication/70021431
ID  - 70021431
ER  -