1. Beale , C. L. 1993
2. Anatomy of nonmetro high-poverty areas: common in plight, distinctive in nature;Beale;Amber Waves,2004
3. Severity and concentration of persistent high poverty in nonmetro areas;Beale;Amber Waves,2006
4. Persistent low-income nonmetro areas in the United States: some conceptual challenges for development policy;Brown;Policy Studies Journal,1991