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Hulupi, R.; Mawardi, S.; Yusianto, Y. Pengujian Sifat Unggul Beberapa Klon Harapan Kopi Arabika Di Kebun Percobaan Andungsari, Jawa Timur (Testing for Superior Traits of Some Arabica Coffee Promising Clones at Andungsari Research Station, East Java). PelitaPerkebunan 2012, 28, 62-71.