United Nations Centre for Human Settlements (Habitat), 1991
Buku Referensi
Spreng, Daniel, editor
Springer, 2012
eBooks
edited by Donald Watson
McGraw-Hill , 1979
Buku Teks
Shinskey, F.G., author
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Buku Teks
Perpustakaan Nasional , 1981
Buku Teks