00492nam a22001697a 4500008004100000020001800041040005500059080002100114245003500135250001300170260004700183300001400230650002000244653001500264653001500279700002800294230309b        |||||||| |||| 00| 0 eng d  a0-8242-0445-X  aNational Science LibrarycNational Science Library  aD 025.343bJ9;L2  aSears list of subject headings  a10th ed.  aNew York: bThe H W Wilson Company, c1972  ax, 590p.   aLibrary science  aEducation   aSears list10aWestby, Barbara M (Ed.)