• The Gazette of the Republic of Sri Lanka (Ceylon), Part - I : Section - III, Trade Mark And Patent Notices, No. 144, Friday December 27, 1974 

  Government of Ceylon (Ceylon Governmnt Printer, 1974-12-27)
• The Gazette of the Republic of Sri Lanka (Ceylon), Part - I : Section - III, Trade Mark And Patent Notices, No. 143, Friday December 20, 1974 

  Government of Ceylon (Ceylon Governmnt Printer, 1974-12-20)
• The Gazette of the Republic of Sri Lanka (Ceylon), Part - I : Section - III, Trade Mark And Patent Notices, No. 141, Friday December 06, 1974 

  Government of Ceylon (Ceylon Governmnt Printer, 1974-12-06)
• The Gazette of the Republic of Sri Lanka (Ceylon), Part - I : Section - III, Trade Mark And Patent Notices, No. 142, Friday December 13, 1974 

  Government of Ceylon (Ceylon Governmnt Printer, 1974-12-13)
• The Gazette of the Republic of Sri Lanka (Ceylon), Part - I : Section - III, Trade Mark And Patent Notices, No. 135, Friday October 25, 1974 

  Government of Ceylon (Ceylon Governmnt Printer, 1974-09-25)

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