Gaya APA
Subrahmanyam, C, P, A, D. (1975).
Community Water Supply And Excreta Disposal Situation In The Developing Countries .
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WHO.
Gaya MLA
Subrahmanyam, C.S, Pineo, And, D.V.
"Community Water Supply And Excreta Disposal Situation In The Developing Countries".
Geneva:
WHO,
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Monograf.