primary or secondary/ external or internal
letters
primary
legislations
primary
newspaper articles
primary
diaries
primary
interviews
primary
government documents
primary
reports
primary
photographs
primary
literature
primary
artworks
primary
artifacts
primary
researches
secondary
textbooks
secondary
journals
secondary
commentaries
secondary
biographies
secondary
criticism or reviews or literary
secondary
when written?
external criticism
where is it written?
external criticism
why did it survive?
external criticism
who was the real author?
external criticism
eyewitness or second hand account?
internal criticism
why was it written?
internal criticism
literal meaning?
internal criticism
internal consistency
internal criticism