00360nam a2200133Ia 4500008004100000020001500041041001200056082002200068100003000090245003600120260003400156300001300190650002300203231217s9999    xx            000 0 und d  a8170001129  aEnglish  a027.454  ISA;1  R  aIsaac, K A. Devarajan, G. 0aLibraries in distance education  c1989bEss Ess Pub.aNew Delhi  axii, 238  adistance,education