Dear colleagues,
could you please help me with text of L.F.Richardson's artcile, cited by Benoit Mandelbrot in "How Long Is the Coast of Britain? Statistical Self-Similarity and Fractional Dimension" as "L.F.Richardson, in General Systems Yearbook 6, 139 (1961)"? I guess correct title of this article is "The Problem of Contiguity: An Appendix to Statistics of Deadly Quarrels".
Thank you in advance