| 000 | 00380nam a2200145Ia 4500 | ||
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_a378.03 _bCOS |
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| 100 |
_aPerraton, Hilary _945658 |
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| 245 | _aThe cost of distance education | ||
| 260 |
_aCambridge: _bInternational Extension College, _c1982. |
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| 300 | _av, 65p | ||
| 500 | _aPB | ||
| 546 | _aeng | ||
| 650 |
_aOpen learning systems-Economic aspects _9195205 |
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| 942 | _cBK | ||
| 999 |
_c9511 _d9511 |
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