Tabanus: The evidence is a bit thin, but there is no other usable candidate with the initials "B. F."Bernard Frank Brodersen, b. 19 Feb 1925 in Denison, Iowa (US Social Security Appl. Index)
Bernard F Brodersen, 34, Dairy Farm, Madaline A Brodersen, 26, Bernard F, 5, b. Iowa (Grant, Cass, Iowa, US Census 1930)
Bernard F Brodersen, 43, ---structor CCC Camp, Madeline Brodersen, 36, Delivery --- Detail --- store, Bernard, 15, Jean, 9 (Grant, Iowa, US Census 1940)
Bernard F Brodersen, arriving from Antwerp, Belgium to New York 31 July 1945 (NY Passenger Lists)
“Brodersen, Bernard F, A50 (2969) 421 se Walnut, Li 5940” (Univ. of Minnesota, Student Address Book 1949-1950)
“Candidates for graduation … Batchelor of Arts … Bernard Frank Brodersen, Minneapolis (Univ. of Minnesota, Commencement June 1950, p. 13)
Bernard Brodersen, Office Worker Tel Co r18 N 13th av apt M (Minneapolis City Directory 1957)
B. F. Brodersen (Chess Results 1975-77, placed 126th in 9th National Open, Las Vegas 1975)
“Broderson, B. USA” (Canadian Open, Toronto 1976) (is this also him?)
“Tied for second, a point behind, were B. F. Brodersen of Minneapolis and …” (on the US Senior Ch Group B in San Diego 1984 (Michigan Chess, Aug 1984, p. 13)
“255. Brodersen, B F AZ ” (Northwest Chess, Nov 1987, p. 195) (US Open 1987 in Portland)
“367. Brodersen, <Bruce K> OR ” (Northwest Chess, Nov 1987, p. 196) (US Open 1987 in Portland) (Bruce was born 1954 and lived in Portland)
Bernard Frank Brodersen, d. 3 March 1991 in Flagstaff, Arizona (US Social Security Death Index)