Sianturi, Roy, Simbolon, Andre, Endayanti, Masriani, AND Gultom, A.. " EVALUASI PERENCANAAN TEMBOK PENAHANAN TANAH LONGSOR KABUPATEN TOBA – SIBORONG-BORONG STA 1 + 135" JURNAL ILMIAH TEKNIK SIPIL [Online], Volume 10 Number 2 (1 February 2023)