NICHOLAS S. VAZZANA SR., 75, a lawyer who specialized in defending the news media against libel charges during his 40-year career and who was a member of the team representing The Associated Press in the precedent-setting Walker libel case before the U.S. Supreme Court in 1967, died Aug. 21 in Huntington, N.Y. The cause of death was not reported.

The court's ruling expanded on its New York Times v. Sullivan findings, which prohibited public officials from recovering libel damages for reports related to official duties unless actual malice was proved. In the Walker case, the court reversed a $500,000 libel judgment obtained by former Maj. Gen. Edwin A. Walker in a Texas state court and extended the Sullivan ruling to include public figures.

CARDINAL JOSE MARIA BUENO MONREAL, 83, who served for 25 years as archbishop of Seville who had served as vice president of the Spanish Bishops Conference from 1972 to 1975, died Aug. 20 in Pamplona, Spain, after a heart attack.

He became archbishop of Seville in 1957 and was named cardinal the next year. He participated in conclaves for the elections of three popes.

MARY (AUNT MARY) DOBKIN, 84, a Baltimore legend and champion of youth whose work helped keep thousands of children out of trouble and inspired a 1979 television movie about her life starring Jean Stapleton, died Aug. 22 at a Baltimore nursing home after a stroke.

She was well-known locally for her annual Christmas parties in which she dispensed toys and affection to needy children. For more than 30 years, she coached a youth baseball league. She came to this country without family from her native Russia. Found nearly dead from frostbite and exposure on a Baltimore street, she grew up in city hospitals. She had been doing volunteer work since 1930.

LI JIN SU, 66, North Korea's minister of state security since 1983 and a senior communist party official, died Aug. 23. He had a heart ailment.

He was a member of the central committee of the communist Workers' Party of Korea. He also served as a deputy to the Supreme People's Assembly, the country's nominal parliament. He was named minister of public security in 1973.

JOYCE PURDY, 54, secretary in the football offices of the U.S. Naval Academy at Annapolis for 36 years before retiring in June 1987, died Aug. 21 at her home in Annapolis. The cause of death was not reported.

WILLIAM W. KEELER, 79, a former president and chief executive officer of Phillips Petroleum Co. who was chief of the Cherokee Nation of Oklahoma from 1949 to 1975, died Aug. 24 at a nursing home in Bartlesville, Okla. The cause of death was not reported.

He began his career with Phillips in 1928 at the company's refinery in Kansas City, Kan. He later served as a supervisor at Texas refineries. He became executive vice president of Phillips in 1956, chairman of the executive committee in 1962, and president and chief executive officer in 1968. He served in that capacity until 1973.

GEORGE V. GOODWIN, 44, a deputy assistant secretary of the interior during the Carter administration who was executive director of the Minnesota Chippewa Tribe at the time of his death, died of a pulmonary disorder Aug. 21 at a hospital in Cass Lake, Minn.

An enrolled member of the White Earth Band of Chippewa Indians, Goodwin was prominent in state, national and tribal Indian affairs. He was the Minnesota area director for the Bureau of Indian Affairs before serving in the Carter administration.

LEONARD (BABY DOO) CASTON, 70, who made the big time as a blues musician in the late 1930s, died Aug. 22 in Minneapolis. The cause of death was not reported.

In Chicago in the late 1930s, he joined a group called the Five Breezes, best known for its recordings of "Sweet Louise" and "Gal O' Mine." Mr. Caston recorded two of his own songs, "I'm Gonna Walk Your Log" and "The Death of Walter Barnes." He later belonged to the Rhythm Rascals and Big Three trios.