TY  - RPRT
TI  - Observer variability in pinniped counts: Ground-based enumeration of walruses at haul-out sites
AU  - Mark S. Udevitz
AU  - C.V. Jay
AU  - M.B. Cody
PY  - 2005
DO  - 10.1111/j.1748-7692.2005.tb01211.x
UR  - https://pubs.usgs.gov/publication/70028999
ID  - 70028999
ER  -