000 00402nam a2200133Ia 4500
008 180710s9999 xx 000 0 und d
020 _a123706
082 _a664.33
_bOPE
100 _aOPEN University of Sri Lanka
245 _aCouses of study leading to the degree of bachelor of science-level 5 PSU 3119: t
260 _aNugegoda
_bOpen University of Sri Lanka
_c1990
300 _a55 p.
942 _cR
999 _c60481
_d60481