• Ceylon Government Gazette, Part - I : Section III, Trade Mark and Patent Notices, No. 14886, Friday December 26, 1969 

  Government of Ceylon (Ceylon Government Printer, 1969-12-26)
• Ceylon Government Gazette, Part - I : Section III, Trade Mark and Patent Notices, No. 14885, Friday December 19, 1969 

  Government of Ceylon (Ceylon Government Printer, 1969-12-19)
• Ceylon Government Gazette, Part - I : Section III, Trade Mark and Patent Notices, No. 14884, Friday December 12, 1969 

  Government of Ceylon (Ceylon Government Printer, 1969-12-12)
• Ceylon Government Gazette, Part - I : Section III, Trade Mark and Patent Notices, No. 14883, Friday December 05, 1969 

  Government of Ceylon (Ceylon Government Printer, 1969-12-05)
• Ceylon Government Gazette, Part - I : Section III, Trade Mark and Patent Notices, No. 14882, Friday November 28, 1969 

  Government of Ceylon (Ceylon Government Printer, 1969-11-28)

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