Gunnar Birkerts. Progressive Architecture 56 September 1975, 63 Gunnar Birkerts. GA Document. 9 1984, 97 Gunnar Birkerts. GA Document. 9 1984, 98 Gunnar Birkerts. Progressive Architecture 54 March 1973, 73 Gunnar Birkerts. Progressive Architecture 56 September 1975, 59 Gunnar Birkerts. Architectural Record. Oct 1971, cover Gunnar Birkerts. Architectural Record. Oct 1971, 110