APA (7th ed.) Zitazioa
Welch, P. (2000). MICROBIAL quality of water in rural cmmunities of Trinidad.
Chicago Style (17th ed.) Zitazioa
Welch, Pedro. MICROBIAL Quality of Water in Rural Cmmunities of Trinidad. 2000.
MLA (9th ed.) Zitazioa
Welch, Pedro. MICROBIAL Quality of Water in Rural Cmmunities of Trinidad. 2000.
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