Rosalyn Unger (1982). "Subcarpathian Ruthenia". Czechoslovakia, a Country Study. Area Handbook Series. American University, Foreign Area Studies. p. 38. Archived from the original on 24 January 2024.
Rosalyn Unger (1982). "Subcarpathian Ruthenia". Czechoslovakia, a Country Study. Area Handbook Series. American University, Foreign Area Studies. p. 38. Archived from the original on 24 January 2024.