Novrinda, Riza, and Irfan Saputra. “Analisis Kemantapan Lereng Kuari Batugamping Di Tuban II PT. United Tractors Semen Gresik Tuban Jawa Timur”. ReTII (March 16, 2017). Accessed July 20, 2025. https://sandbox.itny.ac.id/index.php/ReTII/article/view/509.