Techniques in physical geography / James Hanwell and Malcolm Newson. Hanwell, James D. (James David) Newson, Malcolm David, joint author. Physical geography Technique. GB23 .H36 1973 551.4 HAT Includes Bibliographical References : p. 221-224. and Index. London : Macmillan, 1973. 1973. 1973 Text xiii, 230 p. : eng