TY  - RPRT
TI  - Contaminant exposure of willets feeding in agricultural drainages of the lower Rio Grande valley of south Texas
AU  - T. W. Custer
AU  - C. A. Mitchell
PY  - 1991
DO  - 10.1007/bf00418104
UR  - https://pubs.usgs.gov/publication/1003059
ID  - 1003059
ER  -