=LDR 22 4500 =001 4216 =082 04$a910.02 STR =100 1\$aStrahler, Alan H. =245 10$aPhysical geography: science and systems of the human environment =260 \\$aChichester :$bWiley,$c1997 =650 \0$aBooks =700 1\$aStrahler, Arthur N. =852 \\$bFreeman Library$h910.02 STR