Arias, P. R. (1997). Why upland farmers adopt conservation measures. Manila Bulletin.
Chicago Style (17th ed.) CitationArias, Priscila R. "Why Upland Farmers Adopt Conservation Measures." Manila Bulletin 1997.
MLA citiranjeArias, Priscila R. "Why Upland Farmers Adopt Conservation Measures." Manila Bulletin, 1997.
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