All

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 D01 Inorganic Chemicals D007287 +
  D01.268 Elements D004602 +
   D01.268.549 Metals, Alkali D008672 +
     D01.268.549.125 Cesium D002586 
     D01.268.549.250 Francium D005605 
     D01.268.549.450 Lithium D008094 
     D01.268.549.550 Potassium D011188 
     D01.268.549.650 Rubidium D012413 
     D01.268.549.750 Sodium D012964 
 D01 Inorganic Chemicals D007287 +
  D01.552 Metals D008670 +
   D01.552.528 Metals, Alkali D008672 +
     D01.552.528.160 Cesium D002586 
     D01.552.528.328 Francium D005605 
     D01.552.528.480 Lithium D008094 
     D01.552.528.652 Potassium D011188 
     D01.552.528.759 Rubidium D012413 
     D01.552.528.850 Sodium D012964