TY - RPRT TI - Change-in-ratio density estimator for feral pigs is less biased than closed mark-recapture estimates AU - L.B. Hanson AU - J.B. Grand AU - M.S. Mitchell AU - D.B. Jolley AU - B.D. Sparklin AU - S.S. Ditchkoff PY - 2008 DO - 10.1071/wr08076 UR - https://pubs.usgs.gov/publication/70033097 ID - 70033097 ER -