Transactions of the American society of civil engineers volume 128
The Society, 1963
 Buku Teks
Transactions of the American society of civil engineers (institutud 1852) : volume 127, part I
American Society of Civil Engineers
The Society, 1962
 Buku Teks
Transactions of the American society of civil engineers (institutud 1852) : volume 128, part I
The Society, 1963
 Buku Teks
Transactions of the American society of civil engineers (institutud 1852) : volume 128, part IV
The Society, 1963
 Buku Teks
Kalbermatten, John M.
Appropriate technology for water supply and sanitation : a sanitation field manual / John M. Kalbermatten, DeAnne S. Julius, Charles G. Gunnerson
The World Bank, 1980
 Buku Teks
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