=LDR 22 4500 =001 4221 =082 04$a551.3 BAG =100 1\$aBagnold, R. A. =245 10$aThe Physics of Blown Sand and Desert Dunes =260 \\$aLondon :$bMethuen,$c1941 =650 \0$aBooks =852 \\$bFreeman Library$h551.3 BAG