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The Population of Pennsylvania Projections to 1980
Temple University. Office of Research and Specialized Services
其他書名
Estimates by County for 1965, 1970, 1975, 1980 by Age, Sex, and Race
出版Pennsylvania State Planning Board, 1963
URLhttp://books.google.com.hk/books?id=GSTwAAAAMAAJ&hl=&source=gbs_api