Roy A. Nelson, 75, a retired corrections officer who was active in fraternal and patriotic organizations, died Wednesday at the Southern Maryland Hospital Center in Clinton after a stroke.

He retired as a field parole officer in 1969 after 30 years with the D.C. Department of Corrections. Before joining the Corrections Department in 1939, he had been a member of the Oklahoma City police force for four years.

Mr. Nelson was a 32nd degree Mason and a Shriner. He also belonged to Capitol Hill chapter No. 16 of the Disabled American Veterans.

He was a native of Oklahoma and a graduate of the University of Oklahoma where he played on the football team. He served in the Navy during World War II.

Survivors include his wife, Ruth S., of the home in Washington; a daughter, Nancy Carol Olsen, of Washington, and two sisters, Winnie Moleski, and Ruby Pratt, both of Flint, Mich. Co. until 1976.

Gen. Cotulla was born in Cotulla, Tex., a town named after his grandfather. He earned a degree in geological engineering from the Colorado School of Mines in 1925.

A member of the Army Reserves, he was called to active duty in 1940. During World War II, he was chief of the operations branch and then overseas supply officer at the New York Port of Embarkation. Later he was area petroleum officer for the Caribbean Defense Command.

He was in Korea during the conflict there. He also had duty with the Ryukyus Command in the Pacific and the Army General Staff. He was deputy director of the logistics division of the U.S. European Command, based in France, before returning here on his final assignment.

He is survived by his wife, Marie H., and a daughter, Mary Louise, of the home in Arlington; another daughter, Carolyn Alexander, of Atlanta; a brother, Shelby, of Whittier, Calif., and two granddaughters.

The family suggests that expressions of sympathy be in the form of contributions to the Army Distaff Foundation of Washington.