00326nam a2200109Ia 4500082001900000100002300019245012300042260002600165300001500191500000500206700000500211  a309.4bM681.TE  aMitchell, Colin W.  aTerrain evaluation; an introductory handbook to the history, principles, and methods of practical terrain assessmentb  aLondonbLongmanc1973  axiv, 221p.  a  a