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		Sandi Dharmawan, I., 		Suardana, N., & 		Kusuma Kencanawati, C.
2018 Mar  5.  Analisa Koefisien Penyerapan Suara Dan Kekuatan Impact Komposit Hybrida Batu Apung Dengan Variasi Fraksi Volume Serat Sabut Kelapa 20% Dan 25%/Gypsum. Teknik Desain Mekanika. [Online] 7:2