00413nam a2200145Ia 4500008004100000082001400041100002300055245005500078260005600133300000800189650001400197650002000211653002000231700001600251170901s1976    xx            000 0 und d  a374bN28R  aTripathi, Virendra 0aPreparation of Problem-Oriented Learning Materials  aNew DelhibIndian Adult Education Associationc1976  a111  aEducation  aSocial sciences  aAdult education  aSingh, V.N.