DAFTAR PUSTAKA
Ehler, Victor M, 1965. Municifal and Rural Sanitation. Mc. Graw Hill, Publishing Company Ltd, New Delhi.
Leavel and Clark, 1965. Preventive Medicine for the Doctor in His Community, 3th Edition, McGraw-Hill Inc, New York.
Wagner & Lanoix, 1958. Excreta Disposal for Rural Areas and Small Comunities, World Health Organization. Geneva.
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