He is survived by his wife, Myriam J. Nielsen of San Antonio; sons, Harold R. Nielsen of Bolling Brook, IL, Bernand W. Nielsen of San Antonio, Mark J. Nielsen of Mundlein, IL, Robert J. Nielsen, Jr., of Chicago, IL, and Karl Glenn Nielsen of Oak Arbor, WA; and brother, Karl McKinley Nielsen of Westfield, IL.
In lieu of flowers, memorial contributions may be made to the Alzheimer's Association, 7400 Louis Pasteur, #200, San Antonio, TX 78229.