TY - RPRT TI - Weak support for disappearance and restricted emergence/persistence of highly pathogenic influenza A in North American waterfowl AU - Andrew M. Ramey AU - Erica Spackman AU - Mia Kim Torchetti AU - Thomas J. DeLiberto PY - 2016 DO - 10.1073/pnas.1614530113 UR - https://pubs.usgs.gov/publication/70179383 ID - 70179383 ER -