Items where Author is "Ratya, Helena"
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Ratya, Helena (2017) Timbulan dan Pengumpulan Sampah Rumah Tangga di Kecamatan Rungkut, Surabaya. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
Ratya, Helena (2017) Timbulan dan Pengumpulan Sampah Rumah Tangga di Kecamatan Rungkut, Surabaya. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.