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Martha Ayerza Esra. THE INFLUENCE OF PRODUCT DEVELOPMENT AND MARKETING COMMUNICATION ON INCREASING SALES VOLUME IN PT. GLOBAL UGGUL MANDIRI – PAXEL HEAD OFFICE, JAKARTA. IJSS [Internet]. 2023 Aug. 1 [cited 2025 Aug. 18];3(2):319-28. Available from: https://www.bajangjournal.com/index.php/IJSS/article/view/6497