00558nam a22001457a 4500003000400000005001700004008004100021040001400062100002400076245010800100260000900208300002800217500014000245504002700385OSt20171010095615.0130130t        xxu||||| |||| 00| 0 eng d  aMMSUcULS  aLastica, Ronald D.   aIncidence of lead among bivalves in Gaang river (downstream) Currimao, Ilocos NortecRonald D. Lastica   c2004  axv, 46 leaves c28 cm.   aThesis (BS Environmental Science) -- Mariano Marcos State University-College of Agriculture, Food & Sustainable Development-Batac City   aBibliography: leaf 23