From a mighty fortress
: prints, drawings, and books in the age of Luther, 1483 - 1546 ; [catalog of an exhibition presented at the Detroit Inst. of Arts, Oct. 3 - Nov. 22, 1981 ; National Gallery of Canada, Ottawa, Dec. 4, 1981 - Jan. 31, 1982 ; Kunstsammlungen der Veste Coburg, West Germany, July 18 - Aug. 5, 1982]