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DFA to seek advice of Del Rosario, Locsin on PH's Sabah claim
Published in Manila Bulletin (2022)Article -
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Malaysia rejects PH claim on Sabah through diplomatic note
Published in Manila Bulletin (2020)Article -
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Sabah and our other disputes in SCS. IN Editorial [column]
Published in Manila Bulletin (2020)Article -
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Some truths and lies of our times. IN First things first [column]
Published in Manila Times (2017)Article