Belohlavek founded the Slovak Radio Circle aired on WJBK and later WJLB in Detroit, MI in the 1940s and hosted a half hour program sponsored by the General Stefanik Society. Papers contain a limited amount of material on the Slovak Radio Circle, including meeting minutes, membership lists, reports and correspondence. Included is a 1947 letter informing the of the cancellation of programs such as theirs that bought time from the station and then sold portions of it to individual advertisers. There are also angry letters and a petition denouncing the discontinuance of foreign language programming by the Circle's subsequent broadcasting station, WJLB, in 1948. Approximately 90% of the collection is in Slovak with the majority of documents in English being newsclippings.