Studi tingkat efektifitas Unit Pengolahan Sampah (UPS) dalam mengurangi jumlah sampah di kota Depok (Studi kasus UPS Gunadarma dan UPS Merdeka 2) = Study on the effectiveness rate of solid waste handling facilities (UPS) in reducing waste in Depok city (Case study UPS Gunadarma and UPS Merdeka 2) / Antonius Benedictus - Antonius Benedictus, author (2010)