TY - RPRT TI - Cholinesterase inhibition of birds inhabiting wheat fields treated with methyl parathion and toxaphene AU - K. R. Niethammer AU - Thomas S. Baskett PY - 1983 DO - 10.1007/bf01057591 UR - https://pubs.usgs.gov/publication/5221833 ID - 5221833 ER -