White, D. H., King, K. A., Mitchell, C. A., Hill, E. F., and Lamont, T. G., 1979, Parathion causes secondary poisoning in a laughing gull Larus atricilla breeding colony: Bulletin of Environmental Contamination and Toxicology, v. 23 , no. 1-2, p. 281-284. Abstract Keywords Cotton, brain, gastro, intestinal tract, acetyl, cholin, esterase, death, paralysis, gas chromatography, mass spectrometry, ingestion, insecticide