In memoriam: ROBERT A. KOCH *49 *54, a member of the faculty for 35 years and a specialist in Northern Renaissance art, died Nov. 10 in Raleigh, N.C. He was 92. During World War II Koch was a member of the Monuments, Fine Arts, and Archives Section, a group of art historians who worked to safeguard threatened works of art. In 1955 he joined the art and archaeology faculty, retiring in 1990. Koch also was assistant director of the University Art Museum from 1949 to 1962, when he became faculty curator of prints.