00516nam a22001337a 4500003000400000005001700004008004100021040001400062100002300076245011100099300003100210500011400241504002700355OSt20171010095441.0120608t        xxu||||| |||| 00| 0 eng d  aMMSUcULS  aAbiva, Mhelwin M.   aSocio-economic impacts of quarrying at the Padsan river along San Nicolas, Ilocos Norte cMhelwin M. Abiva  a[xii], 46 leaves c28 cm.   aThesis (BS Environmental Science) -- Mariano Marcos State University-College of Arts and Sciences, Batac City  aBibliography: leaf 33