=LDR            22        4500
=001  4445
=082  04$a551.4 THO
=100  1\$aThornbury, William D.
=245  10$aPrinciples of Geomorphology
=260  \\$aNew York :$bJohn Wiley,$c1954
=650  \0$aBooks
=852  \\$bFreeman Library$h551.4 THO