There has been data ("Budidaya Kopi Konservasi: Berbagi Pengalaman Dari Kabupaten Dairi, Provinsi Sumatera Utara: Panduan Sekolah Lapangan") available for this ISBN from the data sources that books-by-isbn.com uses, but not on the latest request on Sun Jan 5 00:52:37 2020, so the data displayed here has been removed .