Betonio, S. M. Low cost water purifier for residents of urban poor communities.
Lua i Stíl Chicago (17ú heag.)Betonio, Salvador M. Low Cost Water Purifier for Residents of Urban Poor Communities. Thesis (BFA)--University of the Philippines.
Lua MLA (9ú heag.)Betonio, Salvador M. Low Cost Water Purifier for Residents of Urban Poor Communities.
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