1. W. Warntz: Progress in Economic Geography,inP. James, Edit.: New Viewpoints in Geography (Washington, 1959), p. 55
2. Three Principles of Industrial Location
3. For a full comparison between the two approaches, see M. Greenhut: Plant Location in Theory and Practice (Chapel Hill, 1956), pp. 3–100 and 253–272.
4. A. Weber: Theory of the Location of Industries (1909), translated by C. J. Friedrich (Chicago, 1929).
5. See A. Lösch: The Economics of Location (New Haven, 1954).