World Christian Encyclopedia was created in 2001.
The World Christian Encyclopedia estimated almost 21,000 denominations, and the updated World Christian Encyclopedia estimated at least 33,000.
Encyclopedia of World History was created in 1952.
Encyclopedia of Vernacular Architecture of the World was created in 1997.
World Student Christian Federation was created in 1895.
Encyclopedia of Earth was created in 2006.
Encyclopedia of Conifers was created in 2012.
Mining Encyclopedia was created in 1998.
The Otaku Encyclopedia was created in 2009.
The Dante Encyclopedia was created in 2000.
Croatian Encyclopedia was created in 1999.
Klein's encyclopedia was created in 1898.
Encyclopedia of Sound was created in 2001.