TY  - RPRT
TI  - Distance sampling for Sonoran Desert tortoises
AU  - Don E. Swann
AU  - Roy C. Averill-Murray
AU  - Cecil R. Schwalbe
PY  - 2002
DO  - 10.2307/3802929
UR  - https://pubs.usgs.gov/publication/70024320
ID  - 70024320
ER  -