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Ranti Rustika, Abdul Gafur and Tri Retno Nugroho 2023. PROSEDUR PELAKSANAAN EVENT DI HOTEL SWISSBELL BALIKPAPAN SELAMA MASA PANDEMI COVID 19. Prosiding Seminar Nasional Terapan Riset Inovatif (SENTRINOV). 8, 2 (Jan. 2023), 1 - 10.