<Li> Social documents are records created by organizations, such as registers of births and tax records . </Li> <P> In historiography, when the study of history is subject to historical scrutiny, a secondary source becomes a primary source . For a biography of a historian, that historian's publications would be primary sources . Documentary films can be considered a secondary source or primary source, depending on how much the filmmaker modifies the original sources . </P> <P> The Lafayette College Library, provides a synopsis of primary sources in several areas of study: </P> <P> "The definition of a primary source varies depending upon the academic discipline and the context in which it is used . </P>

Why might it be important for historians and researchers to notice who wrote this primary source