The network map presents authors as nodes connected by lines indicating relationships. A central cluster includes stout d e connected to nearby authors such as swain m r, lawson t a, and sorensen j e. Another central grouping includes watty k connected to jackson m, abraham a, and hancock p. A separate cluster includes hassall j m connected to apostolou b, watson s f, and buckless f a. Additional clusters include dellaportas s, sugahara s, jackling b, de lange p, and smith j k. Smaller clusters appear around sangster a, stoner g, marriott n, and duff a, as well as flood b and hassall t.