Clark, Thomas Henry, 1893- Appalachian tectonics / edited by Thomas H. Clark - Toronto : University of Toronto Press, 1967 - 99 p. : ill., maps ; 26 cm. - Special publications (Royal Society of Canada) no.10. . Includes bibliographical references. Subjects--Topical Terms: Geology, Structural--CanadaGeology, Structural--Appalachian Mountains Subjects--Geographic Terms: Appalachian Mountains