Santos, Elma B.  1955- <br/><br/>
Distribution patterns of gastropod populations at the littoral zone of Paoay Lake, Ilocos Norte/ 
Elma B. 
 - 142 leaves : col. ill. 
<br/><br/> Thesis (M.S.)--University of the Philippines, Diliman.  Vita. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gasteropoda--Philippines--Paoay (Ilocos Norte)