Haeck, Gary Dennis The geologic and tectonic history of the central portion of the southern Sierra Madre, Luzon, Philippines by Gary Dennis Haeck - Ithaca, N.Y. Cornell University 1987 - 294 p. : ill. ; 20 cm. Thesis (Ph.D)- Cornell University, 1987 Bibliography : p. 273-283 ISBN: X920046789 Subjects--Topical Terms: Geology--Philippines--Luzon