<Li> Does the author agree or disagree with other authors of the subject? </Li> <Li> Does the content agree with what you know or have learned about the issue? </Li> <Li> Where was the source made? (questions of systemic bias) </Li> <P> In many fields and contexts, such as historical writing, it is almost always advisable to use primary sources if possible, and "if none are available, it is only with great caution that (the author) may proceed to make use of secondary sources ." In addition, primary sources avoid the problem inherent in secondary sources in which each new author may distort and put a new spin on the findings of prior cited authors . </P>

Mention the primary sources that give us information about the modern period in indian history