TY - RPRT TI - Effect of imperfect detectability on adaptive and conventional sampling: Simulated sampling of freshwater mussels in the upper Mississippi River AU - D. R. Smith AU - B. R. Gray AU - T.J. Newton AU - D. Nichols PY - 2009 DO - 10.1007/s10661-009-1251-8 UR - https://pubs.usgs.gov/publication/70037703 ID - 70037703 ER -