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  1. NLM Digital Collections - Applications of Artificial Intelligence for Chemical Inference. Part VI. Approach to a ... 
    Publication: John Wiley & Sons, 1970
    resource.nlm.nih.gov/101584906X930
    ... eliminated from further consideration by that test (subtest ‘ETHION’, Diagram 5). Important g-series peaks (CH,-XH,_,+ ...
  2. NLM Digital Collections - OSHA Industrial Hygiene Field Operation Manual, 1979 
    https://resource.nlm.nih.gov/101084435X224
    ... Above 6 ppm Liver, Lung and Kidney Damage Ethion 6 2750 L -—-- —— TLV Cholinesterase as) 5 3 ( ...