3 1 20 Soedjono Primary Author hartono Additional Author mixed material 9789790272941 Bandung cv titian ilmu 1996 WhatsApp_Image_2025-09-04_at_08.43.54.jpeg.jpeg Soedjono Primary Author H. Hartanto Additional Author mixed material 9789790272507 Bandung titian ilmu 2018 WhatsApp_Image_2025-06-30_at_9.54.30_AM_%281%29.jpeg.jpeg SOEDJONO, BSc Primary Author mixed material 9789790272521 Bandug titian ilmu 2020 WhatsApp_Image_2025-02-04_at_13.55.12_%281%29.jpeg.jpeg