TY - RPRT TI - Effects of water conditions on clutch size, egg volume, and hatchling mass of mallards and gadwalls in the Prairie Pothole Region AU - Pamela J. Pietz AU - Gary L. Krapu AU - Deborah A. Buhl AU - David A. Brandt PY - 2000 DO - 10.1650/0010-5422(2000)102[0936:eowcoc]2.0.co;2 UR - https://pubs.usgs.gov/publication/1001856 ID - 1001856 ER -