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පොල්කටු පිටි,කැබලි/ පොල්කටු අඟුරු සහ සක්‍රීය කාබන් නිෂ්පාදනය [Text - Sinhala]

By: Material type: TextTextLanguage: Sinhala Publication details: Industrial Development Board Moratuwa 1998Description: various Pdg. ill. 23cmTitle translated: Polkatu piti / kebali, polkatu aguru saha sakriya caban nishpadanaya Sri Lanka. Industrial Development BoardSubject(s): DDC classification:
  • 662.93 POL
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