Catchillar, Gerry C. Fundamentals of earth science : a modular approach/ Gerry C. Catchillar, Ryan G. Malenab. - Mandaluyong City : National Book Store, c2005. - xiii, 199 pages : illustrations ; 22 cm. Includes index. ISBN: 9-71086555-2 (pbk.) Subjects--Topical Terms: Earth sciences. Dewey Class. No.: DFil 550 / C28f