Dorothy Potter Benedict, 90, an American Red Cross worker in France during World War I and the author of children's books, died of arteriosclerosis Tuesday at the Army Distaff Hall in Washington, where she had lived for about 20 years.

Mrs. Benedict, who was born and reared in Chicago, worked at a Red Cross canteen at an air base in Isoudun, France, during World War I. It was there she met her husbund, Army Lt. Col. Charles C. Benedict, whom she married in 1919. Col. Benedict was killed in a flying exercise in 1924.

After his death, Mrs. Benedict and her three children lived abroad for a time. In 1936, at the time of the Spanish Civil War, the family was staying on the Spanish island of Minorca. They left the island by British destroyer and Mrs. Benedict later published an account of the incident.

She and her children then returned to the Washington area and Mrs. Benedict worked as a translator for the Air Corps in Washington before and during World War II.

Mrs. Benedict was the author of three children's books published by Pantheon, "Pagan the Black," "Bandoleer," and "Fabulous." She also wrote short stores and articles for magazines, including the Ladies Home Journal.

Survivors include a son, Army Maj. Gen. Calvert P. Benedict of Berlin, Germany; a daughter, Patricia B. Lobdell of Lago Vista, Tex., 10 grandchildren and six great-grandchildren. Another son, Army Air Corps pilot Charles C. Benedict Jr., was killed in World War II.

The family suggests that expressions of sympathy be in the form of contributions to the Superintendent's Fund at the U.S. Military Academy at West Point, N.Y.