Ruth N. Arsem, an information specialist and reference librarian who worked for the federal government for 29 years, retiring in 1973 from an Army ordnance division, died Jan. 24 at her home in Silver Spring, Md. She was 94.

The cause was heart disease, said her husband, Collins Arsem.

Mrs. Arsem came to Washington during World War II and began her federal career at the Pentagon. Later, she worked at the National Bureau of Standards and then the ordnance division of the Army, which evolved into the Harry Diamond Laboratories. It is now the U.S. Army Research Laboratory in Adelphi, Md.

Ruth Niesen was born in Grafton, Wis., and attended the University of Wisconsin.

She was a member of the sodality at Our Lady of Mercy Catholic Church in Potomac, Md..

Her first husband, William E. Ryan, died in 1971 after 22 years of marriage. Survivors include her husband of 41 years, Collins Arsem of Silver Spring.

— Bart Barnes