Source Data Reference for:
City = Sofia
Time = 1950
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Sofia | 1925 | 205,000 | Tertius Chandler | Four thousand years of urban growth | p506 | ||
| Sofia | 1950 | 437,000 | Tertius Chandler | Four thousand years of urban growth | p508 | ||
| Sofia | 1956 | 639,900 | n/a | Statisticheskich ezhegodnik Bulgarija |