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Wilde, Robert. "World War I Timeline: 1914, The War Begins." Greelane, Mayo. 23, 2021, thoughtco.com/world-war-1-short-timeline-1914-1222103. Wilde, Robert. (2021, Mayo 23). Timeline ng Unang Digmaang Pandaigdig: 1914, Nagsimula ang Digmaan. Nakuha mula sa https://www.thoughtco.com/world-war-1-short-timeline-1914-1222103 Wilde, Robert. "World War I Timeline: 1914, The War Begins." Greelane. https://www.thoughtco.com/world-war-1-short-timeline-1914-1222103 (na-access noong Hulyo 21, 2022). (责任编辑：) |