=LDR 22 4500 =001 5500 =082 04$a551.07 MIT =100 1\$aMitchell, Colin W. =245 10$aTerrain Evaluation: an introductory handbook to the history, principles and methods of practical terrain assessment =260 \\$aLondon :$bLongman,$c1973 =650 \0$aBooks =852 \\$bFreeman Library$h551.07 MIT