Slide 9 in this series.
The adjustments made to the NCDC dataset were along the same lines as GISS and NOAA datasets. These clearly are not random or argued as fixing a verified problem.
NCDC: National Climatic Data Center, part of NOAA
NEXT: The adjustments to the raw data provides more weight to the widespread fraud that appears in these cases.
This section on data fraud offers mulitple cases and angles on the general topic. It is however not exhaustive.
USHCN Monthly Temp Adjustments
The list can expand each week given the claims of AGW and their intent.