Digital storefronts and subscription-based sites that host high-definition adult content.
In the BEA’s internal filing system from the 1950s, Document Series E contained "Historical Benchmark Revisions." Document E239 might be the exact folder containing Grace Sward’s handwritten reconciliation tables for the 1954 GDP benchmark revision—a critical year because it incorporated the 1953 SNA (System of National Accounts) changes.