Hatumessen, A., Titahelu, N. and Tupamahu, C. (2021) “ANALISIS EFEKTIVITAS PENUKAR KALOR PIPA HELIKAL DESTILASI MINYAK ATSIRI KAYU PUTIH”, ALE Proceeding, 4, pp. 127-132. doi: 10.30598/ale.4.2021.127-132.