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		Siaka, I., 		Febriyanti, N., 		Sahara, E., & 		Negara, I.
2017 Mar  2.  PEMBUATAN DAN KARAKTERISASI ARANG DARI BATANG TANAMAN GUMITIR (Tagetes erecta) PADA BERBAGAI SUHU DAN WAKTU PIROLISIS. CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry). [Online] 4:2