00345cam a2200121ua 4500041001000000082001900010100002500029245008300054250001200137260005600149300001300205504000500218  aengh  a030.37bhAR/EN  aHarris, Chester W  .  aEncyclopaedia of educational research / cChester W Harris.hTextual Documents  a3 / b.  aNewyork : bMacMillan and Company Limited , c1960.  a1564 ; .  a