Siregar AC, Yatnikasari S, Agustina F, Vebrian V, Jalil M. Productivity Comparison Analysis of Piling Tools Drop Hammer and Jack in Pile in Construction Project of SMAN 14 Samarinda. jts [Internet]. 2023Oct.1 [cited 2025Jun.17];19(2):174-8. Available from: http://114.7.153.31/index.php/jts/article/view/5344