00425nam a2200157Ia 450000500170000000800460001703700120006304000210007504100130009608400210010910000170013024500330014726000470018030000150022765000250024220250508162048.0008  250505s9999    xx            000 0 eng d  aTextual  aFEDL bengcFEDL  aeng2eng  a370.1, NYBqFEDL  aNyberg David 0aPhilosophy of open education  aLondon, UKbRoutledge and Kegan Paulc1975  axiii,213p.  aEducation-Philosophy