Relation History: 2754783

Reverting changeset #106140; NLAHCB import Part 1

Newberry Library Atlas of Historic County Boundarys Part 1

admin_level	6
boundary	administrative
end_event	1850-09-08
import:county_type	county
license	CC0-1.0
name	Contra Costa County (1850-1850)
nl_ahcb:id	1597
nl_ahcb:id_text	cas_contracosta
nl_ahcb:source	Calif. Stats. 1849, 1st sess., ch. 15, sec. 10/p. 60
nl_ahcb:version	1
place	county
source	https://publications.newberry.org/nl_ahcbp/downloads/united_states.html
source:name	Newberry Library Atlas of Historical County Boundaries
start_event	1850-02-18
type	boundary
wikidata	Q108058
wikipedia	en:Contra Costa County, California

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