000 00406nam a2200133Ia 4500
008 180710s9999 xx 000 0 und d
020 _a123731
082 _a547.84
_bOPE
100 _aOPEN University of Sri Lanka
245 _aCourse of study leading to the degree of bachelor of science level 5 PSU 3122-po
260 _aNugegoda
_bThe Open University of Sri Lanka
_c1991
300 _a44 p.
942 _cR
999 _c60417
_d60417