Graven images : the rise of professional printmakers in Antwerp and Haarlem, 1540-1640 (exhibition at Evanston, Mary and Leigh Block Gallery, Northwestern University, from May 6 through June 27, 1993, and Chapel Hill, the Ackland Art Museum, University of North Carolina, from August 15 through September 26, 1993). - Riggs, Timothy A. (Mary and Leigh Block Gallery-Northwestern University,, 1993)