Mathisen, Mark Evan  <br/><br/>
Plio-Pleistocene geology of the central Cagayan Valley Northern Luzon, Philippines  [microform] / 
by Mark Evan Mathisen. 
 - Ann Arbor, Mich. :  University Microfilms International,  1981. 
 - 1 microfilm reel :  positive ;  35 mm. 
<br/><br/>Thesis (Ph.D.) - Iowa State Universty, 1981. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Pleistocene.