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  1. pdfNLM Technical Bulletin, no.117-128 
    https://www.nlm.nih.gov/.../nlmarchives/techbull/117-128-1979.pdf
    ... ALLERGIC was see HAY FEVER 1963-79 search RHINITIS, ALLERGIC under HAY FEVER 1966-79 X RHINITIS, ALLERGIC, NONSEASONAL RHINITIS, VASOMOTOR C9 603 799 910 ...
  2. pdfNLM Technical Bulletin, no.93-104 
    https://www.nlm.nih.gov/.../nlmarchives/techbull/93-104-1977.pdf
    ... C20 - Respiratory allergies: RESPIRATORY HYPERSENSIT1VITY ASTHMA ALVEOLITIS, EXTRINSIC ALLERGIC BIRD FANCIER'S LUNG FARMER'S LUNG HAY FEVER C21 - Occupational diseases, poisoning and injuries affecting respiration: ...