How about the World Almanac for any of the last 40 years ? There is a list of all the popes Peter, Linus, Cletus (or Anacletus), Clement, Etc.
It might be more interesting if this list always was, and is today, the same.
FYI
Corrections Made to Official List of Popes Revelations of "Pontifical Yearbook 2001"
...
"The most significant historical doubt affects Peter's second successor. After Linus, Cletus (80-92) or Clement could have been Pope, either between 68 and 76; or between 92 and 99. Therefore, one could have been Pope before the other."
Go Here for "Pontifical Yearbook 2001"