Baltic light early open-air painting in Denmark and North Germany ; [venues: National Gallery of Canada, Ottawa, 15 October 1999 - 2 January 2000 ; Hamburger Kunsthalle, Hamburg, Germany, 26 January - 26 March 2000 ; Thorvaldsens Museum, Copenhagen, Denmark, 19 April - 18 June 2000] (Yale Univ. Press, 1999)