[K, Na, Ca and Mg contents in the diet of Nanjing workers (author's transl)].
D002118:Calcium / Q000032:analysis*; D002681:China; D004032:Diet; D005504:Food Analysis; D006801:Humans; D008274:Magnesium / Q000032:analysis*; D011188:Potassium / Q000032:analysis*; D012964:Sodium / Q000032:analysis*
D012964:Sodium; D008274:Magnesium; D011188:Potassium; D002118:Calcium