TY  - BOOK
AU  - Worcester,Philip George
TI  - A textbook of geomorphology. / 
U1  - 551 
PY  - 1939///, repr. 1946
CY  - New York : 
PB  - D. Van Nostrand company, inc., 
KW  - Geology
N1  -  "References" at end of each chapter;  Includes bibliographical references and index
ER  -