Books by Pennsylvania. Dept. of Commerce. Bureau of Statistics:
Books in the extended shelves:
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Pennsylvania. Dept. of Commerce. Bureau of Statistics: Industrial directory of Pennsylvania 1913-19 ([s.n.], 1913), also by Research Pennsylvania. Dept. of Commerce. Bureau of Statistics, Pennsylvania. Dept. of Internal Affairs. Bureau of Statistics, and Pennsylvania. Dept. of Labor and Industry. Bureau of Statistics and Information (page images at HathiTrust)- Pennsylvania. Dept. of Commerce. Bureau of Statistics: Statistics by industry and size of establishment. ([Harrisburg], in the 20th century) (page images at HathiTrust)
Find more by Pennsylvania. Dept. of Commerce. Bureau of Statistics at your library, or elsewhere.