- Author: Dirk Gringuis Author Record # 142744
- Legal Name: Gringhuis, Richard H.
- Birthplace: Grand Rapids, Michigan, USA
- Birthdate: 22 September 1918
- Deathdate: 31 March 1974
- Language: English
- Webpages: archives.msu.edu, IMDB, oz.wikia.com, Wikipedia-EN
- Used These Alternate Names: Dirk, Dirk Gringhuis
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Cover Art
- The Baum Bugle, Autumn 1971 (1971)
- The Hidden Valley of Oz (1951)
- Brickbats and Bouquets: Criticism of Frank Kramer's Work (2011)
- Percy, the Personality Kid (1971)
- Terp, the Terrible (1971)
- The Hidden Valley of Oz (1951)
- The Scarecrow (2004)
- The Shaggy Man of Oz (unused Drawing) (1971)
- Who's Who in Oz (1988)