TY - RPRT TI - Estimating site occupancy rates for aquatic plants using spatial sub-sampling designs when detection probabilities are less than one AU - R. M. Nielson AU - B. R. Gray AU - L.L. McDonald AU - P.J. Heglund PY - 2011 DO - 10.1016/j.aquabot.2011.06.004 UR - https://pubs.usgs.gov/publication/70034460 ID - 70034460 ER -