I am indexing a military record called a monthly roster roller. I am indexing one image that is after the first page of the documents full set (I think that's the right way to describe it.) which would have the monthly roster rollers date at the top of the page. the enlistment dates recorded for each name only has the last 2 digits for the year. I looked at the reference images and found the full 4 digits of the year. my question is; is it okay to use that full date to fill in the information for each of the names so they can have full dates even though the full date is recorded in a earlyier image I am not indexing?