The Sustainable Development Goal (SDG) 9: A Case Study of Effectiveness of Ultrasonic Pulse Velocity on Different Lengths of Bintangor and Yellow Meranti Species. International Journal of Academic Research in Progressive Education and Development, [S. l.], v. 13, n. 3, 2024. Disponível em: https://ijarped.com/index.php/journal/article/view/2738. Acesso em: 10 apr. 2026.