This important series presents interdisciplinary perspectives on the intellectual development of planning theory and its implementation. The series brings together both traditional and contemporary classic papers covering the main areas of planning. Each title in the series has been prepared by a prominent specialist in the relevant field under the direction of the series editors. The individual editors have selected the key previously published articles on a given mode or theme and have written an original introduction, which provides an authoritative survey of the literature. In addition, the pagination of the original articles has been deliberately retained in these volumes to facilitate ease of reference. These features combine to make the series an essential reference source which will be of great value to researchers and practitioners alike.