TY - RPRT TI - Incidence of malaria in a wintering population of canvasbacks (Aythya valisineria) on Chesapeake Bay AU - R. M. Kocan AU - J.O. Knisley PY - 1970 DO - 10.7589/0090-3558-6.4.441 UR - https://pubs.usgs.gov/publication/5220521 ID - 5220521 ER -