003580000a22001450004500003000900000005001700009100002600026245004800052050001700100264005100117300000900168041000800177650001400185650001300199PH-MaWHO20241108112116.0  aWard T W, Herzog W.A.  aEffective learning in non-formal education.  aAbridged ed.  aMichigan : bMichigan State University,c1977.  a15p.  aeng  aEducation  aLearning