MARRIAGE REVEALED. Brian DePalma, 38, director of Hollywood chillers (Carrie, The Fury); and Nancy Allen, 28, an actress featured in Carrie; both for the first time; on Jan. 12; in Manhattan.

DIED. Ernst Wolf Mommsen, 68, West German industrialist and former aide to Chancellor Helmut Schmidt; of a heart attack; in Duesseldorf. A successful 25-year veteran of the Ruhr steel business, Mommsen in 1970 joined then Defense Minister Schmidt as his state secretary, with a salary of 1 DM (54-c-) a year, and two years later followed Schmidt to the Department of Economics and Finance. Mommsen was appointed in 1973 chairman of the board of Krupp, West Germany's faltering industrial colossus, and oversaw its two most profitable postwar years before retiring in 1975.

DIED. Nelson A. Rockefeller, 70, millionaire, art collector and four-term Governor of New York who failed three times to win the Republican nomination for President but finally, in 1974, was appointed to the second spot; of a heart attack; in Manhattan (see NATION).

DIED. F.W. Dupee, 74, literary critic and longtime professor of English at Columbia University (1948-71); of a drug overdose; in Carmel, Calif. A Chicago-born graduate of Yale who worked as a Marxist labor organizer in the 1930s, Dupee in 1937 helped recast as anti-Stalinist the Partisan Review, a radical literary magazine founded three years earlier. Eschewing his political extremism, he eventually achieved prominence as a Henry James scholar, popular poetry teacher and elegant writer on figures ranging from Sir Richard Burton to Charlie Chaplin.

DIED. Elizabeth Hadley Mowrer, 87, the first of Ernest Hemingway's four wives; in Lakeland, Fla. Mowrer (nee Richardson) and Hemingway were married in 1921. Five years later, he divorced her to marry Fashion Writer Pauline Pfeiffer. Remorseful, the novelist dedicated The Sun Also Rises to "Hadley," assigned her its royalties, and wrote fondly of her and their one child "Bumby" in his memoirs, A Moveable Feast. In 1933 Hadley married Paul Scott Mowrer, a Pulitzer-prize-winning foreign correspondent and later editor of the Chicago Daily News.

DIED. Elvin C. Stakman, 93, pre-eminent plant pathologist who led the war against wheat diseases; in St. Paul. Combating the fungus diseases called rusts, he attached Vaseline-coated slides to plane wings in 1921 and by collecting the parasitic red spores in the air, proved that the disease blew seasonally across the nation. A member of the University of Minnesota faculty (1909-53) and the Rockefeller Foundation, "Stak" increased the world's wheat yields by breeding new, hardier strains as the fungi also continued to evolve. "Find out all you have to buck," he once said, "and then breed 'em tough."

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