FBI file of George Sabo (1896-1983), a book dealer who specialized in Slavic materials. (This release includes the 2 files transferred to the National Archives).
Sabo's book collection was donated to Seton Hall University in 2012.
For more information on Sabo, see:
David Chroust(2022)A Rusyn-American Life in Books: George Sabo in New York and Florida,Slavic & East European Information Resources,23:1-2,183-207,DOI: 10.1080/15228886.2021.1985708