|aMinerals you eat|h[videorecording] :|bfrom calcium to zinc /|cLearning Seed Company.
|aLake Zurich, Ill. :|bLearning Seed Company,|cc1997.
|a1 videocassette (22 min.) :|bsd., col. ;|c1/2 in.
|aWe really need to eat what we think of as rocks and metal. Humans contain about four pounds of essential minerals that must be obtained through food. Introduces viewers to both macrominerals and trace elements.