GLAESER, L. The Work Of Frei Otto And His Team 1955-1976. s.n.
Lua i Stíl Chicago (17ú heag.)GLAESER, Ludwig. The Work Of Frei Otto And His Team 1955-1976. s.n.
Lua MLA (8ú heag.)GLAESER, Ludwig. The Work Of Frei Otto And His Team 1955-1976. s.n.
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