Analysis of information sources in references of the Wikipedia article "Megalopolis" in English language version.
{{cite book}}: CS1 maint: multiple names: authors list (link)As metropolitan regions continued to expand throughout the second half of the 20th century their boundaries began to blur, creating a new scale of geography now known as the megaregion. Interlocking economic systems, shared natural resources and ecosystems, and common transportation systems link these... The challenge of identifying... emerging regions has been undertaken... The most recent iteration... has been developed by Regional Plan Association (RPA) in partnership with the Lincoln Institute of Land Policy. Eleven such megaregions have been identified... that would make cooperative integrated planning advantageous... Th[e] tradition of geographers and planners attempting to enhance the value of geographic definitions to meet the needs of new generations continued with the first identification of a scale larger than the metro regions by French geographer Jean Gottmann in his 1961 book Megalopolis. This "Megalopolis" referred specifically to the Northeastern United States ... Regional Plan Association also identified this emerging Northeast Megaregion in the 1960s.