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_c60448 _d60448 |
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| 005 | 20220104111911.0 | ||
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| 020 | _a123724 | ||
| 041 | _aEN | ||
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_a547.73 _bOPE _223 |
||
| 100 | _aOPEN University of Sri Lanka | ||
| 245 | _aCourse of study leading to the degree of bachelor of science, level 5 PSU 3121-o | ||
| 260 |
_aNugegoda _bOpen University of Sri Lanka _c1988 |
||
| 300 | _a31 p. | ||
| 509 | _aNS | ||
| 942 | _cR | ||