Wisanggeni, Puthut, ImanantoEding Iskak, and YudiantoEri Andrian. 2020. “SOFT SOIL IMPROVEMENT USING PREFABRICATED VERTICAL DRAIN (PVD) (Study Location of Grand Island Pakuwon City Surabaya, East Java): Study Location: Housing Development at Grand Island Pakuwon City Surabaya, East Java”. STUDENT JOURNAL GELAGAR 2 (2), 28-35. https://ejournal.itn.ac.id/index.php/gelagar/article/view/2838.