Keywords: US Energy Flow-1990 (1973 projection).png en US Energy Flow-1990 1973 projection 1973-11-16 Lawrence Livermore Laboratory U S Energy Flow Diagrams for 1950 1960 1970 1980 1985 and 1990 published November 16 1973 A L Austin S D Winter PD-USGov Energy statistics of the United States Uploaded with UploadWizard Energy flow diagrams |