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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 260 Diet, Fat-Restricted E02.642.249.265 Diet, Gluten-Free E02.642.249.268 Diet, High-Protein E02. ... Diet, Fat-Restricted G07.203.650.240.265 Diet, Gluten-Free G07.203.650.240.267 Diet, High-Fat ...
  2. pdf1-20-1969-70.pdf 
    https://www.nlm.nih.gov/.../nlmarchives/techbull/1-20-1969-70.pdf
    ... produced during the last three years, on the theory that any bibliography over three years old which ... B6) COCONUT PEANUTS VEGETABLES CASSAVA (B6) RHUBARB (B6) SOY BEANS * SHELLFISH is coordinated with MOLLUSCA or CRUSTACEA ...