Alamancs are sources of factual information, typically issued once a year. Some titles have been published for over 100 years, making them valuable sources of historical data as well. For example, they can help you determine historically accurate terminology, which is useful when searching newspapers.
We've also included in this section some of the older encyclopedia sets which, while not almanacs, do share with almanacs the quality of being issued regularly over time (sometimes as often as every year).
Chronologies are another source of factual information, and we have listed them here as well.