Peta geologi teknik lembar Magelang dan Semarang, Jawa = engineering geological map of Magelang and Semarang quadrangle, Java - Hermawan; Dodid Murdohardono; Tobing, Tigor; Siagian, Yousana OP; Sudibjo (Peta geologi teknik bersistem, Jawa ; lembar Magelang- Semarang (1409-2 dan 1408-5), 1997)