Census microdata from the 1911-1951 enumerations form the first and the core of the four primary data sources. Other primary data sources include Statistics Canada documentary sources concerning the enumeration process; newspaper evidence about the enumerations at the time of each enumeration; and House of Commonsand Senate debates related to the enumerations. The goal of this component of the CCRI is to provide researchers with the contextual evidence necessary to undertake appropriate analysis of the census microdata.