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Keywords from Image Description:
THIS IS HELIOSTAT PLANE SURFACE CONSISTING OF MANY FLAT MIRRORS ABOUT FEET TALL WHICH IS PART OF THE SOLAR... NARA . Scope and content General notes Local identifier DA Environmental Protection Agency NARAAuthor Norton Boyd Photographer File THISISAHELIOSTAT APLANESURFACECONSISTINGOFMANYFLATMIRRORS ABOUTFEETTALLWHICHISPARTOFTHESOLAR