TY - BOOK AU - Ward,Freeman TI - Recent geological history of the Delaware Valley below the Water Gap AV - QE158.D4 W3 PY - 1938/// CY - Harrisburg, Pa. PB - Dept. of Internal Affairs, Topographic and Geologic Survey KW - Geology KW - Pennsylvania KW - Delaware River Valley (N.Y.-Del. and N.J.) N1 - Includes bibliographical references ER -