TY - RPRT TI - Interactive effects of boron, selenium, and dietary protein on survival, growth and physiology in mallard ducklings AU - D. J. Hoffman AU - C. J. Sanderson AU - L. J. LeCaptain AU - E. Cromartie AU - G.W. Pendleton PY - 1991 DO - 10.1007/bf01055918 UR - https://pubs.usgs.gov/publication/5222773 ID - 5222773 ER -