“Effect of Copper Sulfate Impregnation on the Physical-Mechanical Properties of Sengon and Coconut Wood: Pengaruh Impregnasi Tembaga Sulfat Terhadap Sifat Fisis-Mekanis Kayu Sengon Dan Kelapa”. PERENNIAL 22, no. 2 (October 31, 2026): 93–100. Accessed November 5, 2026. https://journal.unhas.ac.id/index.php/perennial/article/view/53690.