00477     2200193   4500001002100000005001500021008004100036020001500077035001900092041000700111082001200118090001800130100001700148245002300165250001100188260003900199300003500238650001000273INLIS00000000000002020210430103150210430|||||||||   |   |||   |||| ||   |   a0045510490  0010-0421000020  aid0 a631.473  a631.473 GER s0 aGerrard, A.J00aSoils and landform  aCet. 1  aLondonbGeorge Allen & Unwinc1981  axxviii, 219 hlm.: ill.; 24 cm. 0aTANAH