Dr. Clement R. Brown Sr., 76, a retired official of the Library of Congress, died Dec. 26 at St. Agnes Hospital in Baltimore. He had suffered from cancer.

He was chief of bibliography in the Library's science and technology division for 22 years before retiring in 1968.

Dr. Brown was a native of Grand Rapids, Mich. He earned a bachelor's degree in mechanical engineering at the University of Michigan in 1924 before coming to Washington.

He earned master's and doctoral degrees in engineering at Catholic University. He worked for the National Bureau of Standards for 14 years before becoming chief of materiel at the Maritime Commission in 1940, a job he held until joining the Library of Congress in 1946.

After retiring, Dr. Brown worked for a time as an engineering consultant to Maryland's state road commission.

He was a member of St. Louis' Catholic Church in Clarksville, Md., the Holy Name Society, and the Knights of Columbus.

His professional memberships included the American Society of Mechanical Engineers.

Survivors include his wife, Elizabeth M., of the home in Clarksville; four sons, Dr. Clement R. Jr, of Chicago, Paul B., of Toms River, N.J., James G., of Finksburg, Md., and Michael A., of Columbia, Md.; a sister, Virginia Draper, of Bradenton, Fla.; four other sisters Roberta Anderson, Margaret Camling, Sister Carmen S.O.M. and Sister Georgia S.O.M., and a brother, Paul, all of Michigan; another brother, the Rev. Louis, of Chicago: 14 grandchildren, and one great-grandchild.