- Author: Allen S. Kline Author Record # 191598
- Legal Name: Kline, Allen Sides
- Birthplace: Rock Falls, Whiteside, Illinois, USA
- Birthdate: 19 December 1893
- Deathdate: 19 February 1971
- Language: English
- Webpages: geni.com
- Note: Though mentioned in 'Science-fiction: The Gernsback Years' as being the son of Otis Adelbert Kline, there is no evidence that Otis was ever even married. He did have a brother though, Allen Sides Kline (1893-1971).
- Author Tags: lost race (1)
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Novels
- The Secret Kingdom (1929) with Otis Adelbert Kline
- The Secret Kingdom / Scratch One Asteroid (2015) [O] with Willard Hawkins and Otis Adelbert Kline