Industrial directory of Pennsylvania /
Commonwealth of Pennsylvania, Department of Labor and Industry.
APA Citation
Pennsylvania. Department of Labor and Industry., Pennsylvania. Department of Labor and Industry. Bureau of Statistics and Information. (19141920). Industrial directory of Pennsylvania. Harrisburg: Bureau of Statistics and Information.
MLA Citation
Pennsylvania. Department of Labor and Industry, and Pennsylvania. Department of Labor and Industry. Bureau of Statistics and Information. Industrial Directory of Pennsylvania. Harrisburg: Bureau of Statistics and Information, 19141920.
Warning: These citations may not always be complete (especially for serials).