Which is the most important reference source when writing a novel set in the early twentieth century?

fashion magazines of that period

maps used during that period

personal diaries of people from that period

ledgers of banks and financial institutions from that period
@anonymous_user

Question

Which is the most important reference source when writing a novel set in the early twentieth century?

fashion magazines of that period

maps used during that period

personal diaries of people from that period

ledgers of banks and financial institutions from that period
   @anonymous_user

anonymous_user · Answer

You would need personal diaries of people from that period.