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- catalog contributor b8649101.
- catalog created "1950.".
- catalog date "1950".
- catalog date "1950.".
- catalog dateCopyrighted "1950.".
- catalog extent "xii, 183 p.".
- catalog issued "1950".
- catalog issued "1950.".
- catalog language "eng".
- catalog publisher "New York, Columbia Univ. Press,".
- catalog subject "Aged".
- catalog subject "W3 HE351 1949".
- catalog title "The social and biological challenge of our aging population.".
- catalog type "Congresses".
- catalog type "text".