Wright Studies, Volume Two: Fallingwater and Pittsburgh - Twin Suspension Bridges and Civic Center at Park Point for the Allegheny Conference, project - FLLW Archive Drawing Number 4836.012: Section (p. 95, fig. 14)

Drawing Citation

Drawing 012 - Longitudional section showing the Allegany River Bridge
Twin Suspension Bridges and Civic Center at Park Point for the Allegheny Conference, project (is cited in)
Wright Studies, Volume Two: Fallingwater and Pittsburgh (published in)