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Journal Article The Aged in Cities Get access James E. Birren, PhD James E. Birren, PhD Director 2Gerontology Center, University Park USCLALos Angeles, Calif. 90007 Search for other works by this author on: Oxford Academic PubMed Google Scholar The Gerontologist, Volume 9, Issue 3Part₁, Autumn 1969, Pages 163–169, https: //doi. org/10. 1093/geront/9. 3Part₁. 163 Published: 01 October 1969
James E. Birren (Mon,) studied this question.