00414nam a22001097a 4500008004100000040005500041245010500096260005200201300001500253650001300268700002300281230726b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  aReport of the 54th national conference on weights and measures 1969 c/ U. S. Department of Commerce  aU.S.A.: bU. S. Department of Commerce, c1969   aix, 262p.   aScience   aKoeser, R L (Ed.)