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Yulianita S. CASE STUDY INCOME ANALYSIS OF COCONAT PALM SUGAR BUSINESS IN SIMPANG KIRI DISTRICT, SUBULUSSALAM CITY. IHERT [Internet]. 2019 Dec. 30 [cited 2025 Apr. 19];1(1):101-14. Available from: http://proceeding.unefaconference.org/index.php/IHERT/article/view/9