00297nam a2200109Ia 4500008004100000020001800041082001500059100001600074245004300090260004600133300000800179190710s9999    xx            000 0 und d  a81-7022-246-X  a374.4,An81  aAnsari, M M 0aEconomics of distance higher education  aNew DelhibConcept publishing compac1992  a144