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_c60375 _d60375 |
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| 005 | 20220104111805.0 | ||
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| 041 | _aEN | ||
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_a547.6 _bOPE _223 |
||
| 100 | _aOPEN University of Sri Lanka | ||
| 245 | _aCourse of study leading to the degree of bachelor of science level 4 PSU 2114: o | ||
| 260 |
_aNugegoda _bThe Open University of Sri Lanka _c1986 |
||
| 300 | _aiii, 161 p. | ||
| 509 | _aNS | ||
| 942 | _cR | ||