• Ceylon Government Gazette, Part - I : Section-III, Trade Mark & Patent Notices, No. 12262, December 30 Friday, 1960 

  Government of Ceylon (Ceylon Government Printer, 1960-12-30)
• Ceylon Government Gazette, Part - I : Section-III, Trade Mark & Patent Notices, No. 12255, December 23 Friday, 1960 

  Government of Ceylon (Ceylon Government Printer, 1960-12-23)
• Ceylon Government Gazette, Part - I : Section-III, Trade Mark & Patent Notices, No. 12250, December 16 Friday, 1960 

  Government of Ceylon (Ceylon Government Printer, 1960-12-16)
• Ceylon Government Gazette, Part - I : Section-III, Trade Mark & Patent Notices, No. 12245, December 09 Friday, 1960 

  Government of Ceylon (Ceylon Government Printer, 1960-12-09)
• Ceylon Government Gazette, Part - I : Section-III, Trade Mark & Patent Notices, No. 12241, December 02 Friday, 1960 

  Government of Ceylon (Ceylon Government Printer, 1960-12-02)

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