TY - RPRT TI - Early imprinting in wild and game-farm mallards (Anas platyrhynchos): Genotype and arousal AU - K.M. Cheng AU - R.N. Shoffner AU - R.E. Phillips AU - L.J. Shapiro PY - 1979 DO - 10.1037/h0077615 UR - https://pubs.usgs.gov/publication/1001511 ID - 1001511 ER -