000 00405nam a2200133Ia 4500
008 180710s9999 xx 000 0 und d
020 _a123699
082 _a666.1
_bOPE
100 _aOPEN University of Sri Lanka
245 _aCourse of study leading to the degree of bachelor of science, level 5, PSU 3119-
260 _aNugegoda
_bThe Open University of Sri Lanka
_c1989
300 _a54 p.
942 _cR
999 _c60450
_d60450