Ivan Romanoff was a Canadian of mixed Ukrainian descent, who produced international choral music from the 1940s thru the 1970s. It included European, Russian and Ukrainian. His group was composed of male singers of various nationalities, and some songs used the female solo voice of Lesia Zubrak. The music has not been reissued.
Here is his Ukrainian album from the late 1960s.
Selections:
1. Hey Na Hori
2. Vzyav bi Ya Banduru
3. The mosquito and the fly
4. Oy ne svity misyachenku
5. Dumy moyi
6. Ridna maty moya
7. Zasvistaly kozachenky
8. Nich yaka misyachna
9. Rozpryahayty khlopchi koni
10. Nad rikoyu viyshla zvizda
11. Reve ta stohne Dniepre shirokiy
(To hear more than the 10 minute "sample" you will need the Veoh downloader.)