Sadongdong, M. A. (2021). Russian envoy assures supply of Sputnik vaccines for PH. Manila Bulletin.
芝加哥风格引文Sadongdong, Martin A. "Russian Envoy Assures Supply of Sputnik Vaccines for PH." Manila Bulletin 2021.
MLA引文Sadongdong, Martin A. "Russian Envoy Assures Supply of Sputnik Vaccines for PH." Manila Bulletin, 2021.
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