00314nam a2200109Ia 4500008004100000020001800041082001500059100001700074245005500091260004600146300001200192190710s9999    xx            000 0 und d  a81-309-0188-9  a378.03 R11  aReddy, G Ram 0aOpen and flexible learning : issues and challenges  aNew DelhibViva Books Private Limitc2006  axiv,128