Added citations to codebooks

exports/city-membership/city-membership-codebook.txt

@@ -2,7 +2,7 @@ Dataset title: City-level membership data by denomination from the U.S. Censuses
 Source: American Religious Ecologies <https://religiousecologies.org>
 Creator: Roy Rosenzweig Center for History and New Media <https:rrchnm.org>
 Date released: 2024
-DOI: TK
+DOI: 10.31835/relec.data.002
 
 Description: This dataset contains the membership data for denominations (or other religious groupings) grouped by city. Included are the cities data listed in the 1906, 1916, 1926, and 1936 censuses. Note that in addition to the number of congregations and total membership, the census bureau in some years reported membership data broken down by age (over or under 13 years old) and in other years by sex (male and female).
 
@@ -26,4 +26,8 @@ Other information:
 
 Citations: 
 
-TK (pages in published records where the cities data is listed)
+- E. Dana Durand, Religious Bodies: 1906, Part 1 Summary and General Tables (Washington: Government Printing Office, 1910), 16-18.
+- Sam. L. Rogers, Religious Bodies: 1916, Part 1 Summary and General Tables (Washington: Government Printing Office, 1919), 15-17.
+- W. M. Steuart, Religious Bodies: 1926, Volume 1 Summary and Detailed Tables (Washington: Government Printing Office, 1930), 10-12.
+- J. C. CAPT, Religious Bodies: 1936, Volume 1 Summary and Detailed Tables (Washington: Government Printing Office, 1941), 11-16.
+

exports/denominations/denominations-codebook.txt

@@ -2,7 +2,7 @@ Dataset title: Denominations in the U.S. Censuses of Religious Bodies
 Source: American Religious Ecologies <https://religiousecologies.org>
 Creator: Roy Rosenzweig Center for History and New Media <https:rrchnm.org>
 Date released: 2024
-DOI: TK
+DOI: 10.31835/relec.data.001
 
 Description: This dataset contains a list of the denominations (or other religious groupings) used by the U.S. Census Bureau in the federal Census of Religious Bodies. Included are the denominations listed in the 1906, 1916, 1926, and 1936 censuses. The same denomination will appear in different census years. Not all denominations will appear in each year, because the Census Bureau changed with denominations it counted each decade, but also because denominations split, merged, were formed, or were dissolved from decade to decade. 
 
@@ -19,7 +19,3 @@ Fields:
 
 Other information: 
 - Missing data is represented by an `NA`.
-
-Citations: 
-
-TK (pages in published records where the denominations are listed

exports/populated-places/populated-places-codebook.txt

@@ -2,7 +2,7 @@ Dataset title: Populated places listed in the 1926 Census of Religious Bodies
 Source: American Religious Ecologies <https://religiousecologies.org>
 Creator: Roy Rosenzweig Center for History and New Media <https:rrchnm.org>
 Date released: 2024
-DOI: TK
+DOI: 10.31835/relec.data.003
 
 Description: This dataset contains a list of populated places suitable for use with the city-level data published by the U.S. Census Bureau in the 1926 Census of Religious Bodies. The Census Bureau defined a city as a place that had a population greater than or equal to 25,000 people in the 1920 decennial population census, and additional information is available for those cities.
 
@@ -24,6 +24,7 @@ Other information:
 
 Citations: 
 
-TK (population data)
-
-TK (populated place data from the USGS)
+- E. Dana Durand, Religious Bodies: 1906, Part 1 Summary and General Tables (Washington: Government Printing Office, 1910), 374, table 5.
+- Sam. L. Rogers, Religious Bodies: 1916, Part 1 Summary and General Tables (Washington: Government Printing Office, 1919), 330, table 64.
+- W. M. Steuart, Religious Bodies: 1926, Volume 1 Summary and Detailed Tables (Washington: Government Printing Office, 1930), 348, table 30.
+- J. C. CAPT, Religious Bodies: 1936, Volume 1 Summary and Detailed Tables (Washington: Government Printing Office, 1941), 424, table 30.