Comparative Analysis and Evaluation of the Conversion Formula for Rebound Number of Schmidt Hammer Test and Unconfined Compressive Strength Test – Case Study: Andesite Rock Slope in Graha Puspa, Lembang Fault. Rud.-geol.-naft. zb. 2024;39(1):45-54. doi:10.17794/rgn.2024.1.5