00429nam a2200145 a 450000500170000010000230001710000220004024500650006226000300012730000230015796400160018099700180019699900170021495200520023120251203091217.0  aSmith, Mary Leed_  aGlass, Gene V.d_  aResearch and evaluation in education and the social sciences  aPrentice-Hall, Inc.c1987  a322 p.c22 cm.bPB  bcdefg_  a37559 LIBSS C  c33945d33945  00104070aPUbPUd2000-01-06l0o p37559yBK