1. Essays in context : : Unfolding the Netherlandish Diptych (exhibition 'Prayers and Portraits' : Washington, National Gallery of Art, 12 November 2006 - 4 February 2007 ; Antwerpen, Koninklijk Museum voor Schone Kunsten, 3 March - 27 May 2007) / / edited by John Oliver Hand and Ron Spronk ; essays by Victor M. Schmidt, Lorne Campbell, Laura D. Gelfand,...(et al).