Site plan [for the] 22nd International Geographical Congress, (22e Congres International de Geographie, [showing the areas used by the Congress on the various floors of the buildings of the University of Montreal] / 
Castner, Henry W.
[Montreal :  22nd International Geographical Congress, 
1972]
A triple stereographic projection with central meridians 120 ̊apart is employed to facilitate the portrayal of the information in three dimensions.