Source Data Reference for:

City = Belem
Time = 1950

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Para	1925	257,000			Tertius Chandler	Four thousand years of urban growth	p506
Para	1950	254,000			Tertius Chandler	Four thousand years of urban growth	p509
Belem	1950	254,900			n/a	Anuario estatistico do Brasil ISSN 0100-1299