TY  - RPRT
TI  - Estimation of wildlife population ratios incorporating survey design and visibility bias
AU  - Michael D. Samuel
AU  - R. Kirk Steinhorst
AU  - Edward O. Garton
AU  - James W. Unsworth
PY  - 1992
DO  - 10.2307/3809465
UR  - https://pubs.usgs.gov/publication/1003805
ID  - 1003805
ER  -