TY  - RPRT
TI  - Sightability adjustment methods for aerial surveys of wildlife populations
AU  - R.K. Steinhorst
AU  - M.D. Samuel
PY  - 1989
DO  - 10.2307/2531486
UR  - https://pubs.usgs.gov/publication/1003853
ID  - 1003853
ER  -