erc:
who: United States. Bureau of the Census.
what: 1990 Census County Block Map (Recreated): Bosque County, Block 6
when: 1990
where: https://texashistory.unt.edu/ark:/67531/metapth362369/
erc-support:
who: University of North Texas Libraries
what: Permanent: Stable Content:
when: 20081203
where: https://texashistory.unt.edu/ark:/67531/