Married. Tricia Nixon, 25, daughter of the President; and Edward Finch Cox, 24 (see THE NATION),

Married. Hayley Mills, 25, dimpled Disney child star who won a special Oscar for her 1960 performance in Pollyanna; and Roy Boulting, 57, British producer-director and Hayley's longtime chum; she for the first time, he for the fourth; in Cap-d'Ail, France.

Died. J.I. Rodale, 72, organic-food advocate and magazine publisher; of a heart attack suffered while taping the Dick Cavett Show; in Manhattan. "I'm going to live to be 100 unless I'm run down by a sugar-crazed taxi driver," quipped Rodale, a millionaire who followed his own advice: avoid refined white sugar and eat only pure foods. It was by disseminating that counsel in such Rodale Press magazines as Prevention (circ. 1,025,000) and Organic Gardening and Farming (circ. 725,800) that the energetic popularizer of sunflower seeds became a hero of the natural-foods movement. A versatile businessman, Rodale was a partner in an electrical-equipment firm in the early '40s when he started his crusade against food additives, chemical fertilizers and pesticides. He also wrote and produced several plays on the health-ecology theme that flopped off-Broadway.

Died. Leo Burnett, 79, master advertising man whose agency's brainchildren include the Marlboro Man and the Jolly Green Giant (see BUSINESS).

Died. Arnoldo Mondadori, 81, founder of Italy's largest publishing house; of kidney disease; in Milan. The son of an illiterate shopkeeper, Mondadori went to work as a printer's apprentice at 17 and ultimately bought out his employer. He then published cowboy stories, whodunits, comic books and greeting cards. One of Italy's leading picture magazines, Epoca, and Panorama, a newsmagazine, were also Mondadori products. His books include the first Italian translations of such writers as John Steinbeck and Ernest Hemingway.

Died. Alvin Johnson, 96, a founder and longtime head (1923-45) of Manhattan's New School for Social Research; of a stroke; in Upper Nyack, N.Y. A Nebraska farm boy who mastered Latin and Greek, Johnson went on to teach economics at eight universities and join Walter Lippmann as one of the first editors of the New Republic. In 1919, along with such other intellectual rebels as Historian Charles Beard and Philosopher John Dewey, he established the New School. As director of the free-form institution, Johnson set up a "University in Exile" that offered haven to more than 150 scholars who fled from Hitler.

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