Trvalý odkaz
https://oailib.unej.ac.id/vufind/Record/0%20%1Fnhttp:__pustaka.kebudayaan.kemdikbud.go.id_index.php%3Fp=show_detail&id=1100&keywords=prof+dr+r+suharso
https://oailib.unej.ac.id/vufind/Record/0%20%1Fnhttp:__pustaka.kebudayaan.kemdikbud.go.id_index.php%3Fp=show_detail&id=1100&keywords=prof+dr+r+suharso