00402nam a22001337a 4500008004100000040005500041080001900096100002000115245005000135260004400185300001100229650001500240653001300255230529b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a612.39:546bJ6  aUnderwood, E J   aTrace elements in human and animal nutrition   aNew York: bAcademic Press Inc., c1956  a430p.   aNutrition   aAnimals