Volume II. Total Requirements Tables
United States. Bureau of Labor Statistics. "Volume II. Total Requirements Tables" in Historical and Projected Input-Output Tables of the Economic Growth Project : Bulletin of the United States Bureau of Labor Statistics, No. 2056 (1980). https://fraser.stlouisfed.org/scribd/?item_id=499664&filepath=/files/docs/publications/bls/bls_2056_1980_v2.pdf&start_page=1, accessed on August 19, 2017.