00445pam a2200181 a 4500001000800000005001700008008004100025010001700066020001500083040001800098041000800116080001500124082001900139100000700158101000800165245003800173504005200211397865920171227034622.0950410s1996    njua     b    001 0 eng    a   95016730   a0023408146  aDLCcDLCdDLC  aeng  a370.78 GAY00a370.78 GAY2201 a46  aEDU10aEducational research :cL.R. Gay.  aIncludes bibliogaphical references and indexes.