Sugijanto Padmo has written: 'Landreform dan gerakan protes petani Klaten, 1959-1965' -- subject- s -: Land reform, Peasantry, Peasant uprisings 'Laporan studi tentang lukisan masyarakat Kecamatan Purworejo-Klampok, Kabupaten Banjarnegara, Jawa Tengah' -- subject- s -: Social conditions, Economic conditions