http://www.cde.state.co.us/stateinfo/
A list of non-url changes made to bibliographic records. The Excel files contain the OCLC number, call number, title, type of change, and new call number if appropriate.
2023
| January | March | ||
2022
| January | February | March | April |
| May | June | July | August |
| September | October | November |
2021
| January | February | March | April |
| May | June | July | August |
| September | October | November | December |
2020
| January | February | March | April |
| May | June | July | August |
| September | October | November | December |
2019
| January | February | March | April |
| May | June | July | August |
| September | October | November | December |
2018
| January | February | March | April |
| May | June | July | August |
| September | November | December |
2017
| January | February | March | April |
| June | July | August | |
| September | October | November | December |
2016
| January | February | March | April |
| May | June | July | August |
| September | October | November | December |
2015
| January | February | March | April |
| May | June | July | August |
| September | November | December |
2014
| January | February | March | April |
| May | June | July | August |
| September | October | November | December |
2013
| January | February | March | April |
| May | June | July | August |
| September | October | November | December |
2012
| January | February | March | April |
| May | June | July | August |
| September | October | November | December |
2011
| January | February | March | April |
| May | June | July | August |
| September | October | November | December |
2010
| January | February | March | April |
| May | June | July | August |
| September | October | November | December |
2009
| November | December |