• The Gazette of the Republic of Sri Lanka (Ceylon), Part - I : Section - III, Trade Mark And Patent Notices, No. 121, Friday July 19, 1974 

  Government of Ceylon (Ceylon Government Printer, 1974-07-19)
• The Gazette of the Republic of Sri Lanka (Ceylon), Part - I : Section - III, Trade Mark And Patent Notices, No. 120, Friday July 12, 1974 

  Government of Ceylon (Ceylon Government Printer, 1974-07-12)
• The Gazette of the Republic of Sri Lanka (Ceylon), Part - I : Section - III, Trade Mark And Patent Notices, No. 118, Friday June 28, 1974 

  Government of Ceylon (Ceylon Government Printer, 1974-06-28)
• The Gazette of the Republic of Sri Lanka (Ceylon), Part - I : Section - III, Trade Mark And Patent Notices, No. 117, Friday June 21, 1974 

  Government of Ceylon (Ceylon Government Printer, 1974-06-21)
• The Gazette of the Republic of Sri Lanka (Ceylon), Part - I : Section - III, Trade Mark And Patent Notices, No. 116, Friday June 14, 1974 

  Government of Ceylon (Ceylon Government Printer, 1974-06-14)

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