40 works in English-language magazines
| Date | Page | Type | Title | Magazine |
|---|---|---|---|---|
| May 1960 | 56 | Short Fiction | A Pride of Islands | If, May 1960 |
| June 1960 | 115 | Short Fiction | Tulan | Amazing Science Fiction Stories, June 1960 |
| February 1961 | 104 | Short Fiction | The Drug | Galaxy Magazine, February 1961 |
| September 1961 | 87 | Short Fiction | Specimen | Fantastic Stories of Imagination, September 1961 |
| July 1962 | 106 | Short Fiction | All That Earthly Remains | If, July 1962 |
| June 1963 | 62 | Short Fiction | A Guest of Ganymede | Worlds of Tomorrow, June 1963 |
| September 1963 | 86 | Short Fiction | The Demon of the North | Fantastic Stories of Imagination, September 1963 |
| December 1963 | 126 | Short Fiction | And All the Earth a Grave | Galaxy Magazine, December 1963 |
| April 1964 | 114 | Short Fiction | Under the Gaddyl | Worlds of Tomorrow, April 1964 |
| May 1964 | 118 | Short Fiction | For Every Action | Amazing Stories, May 1964 |
| August 1964 | 6 | Short Fiction | The Slaves of Gree | If, August 1964 |
| October 1964 | 6 | Short Fiction | Beyond the Ebon Wall | Fantastic Stories of Imagination, October 1964 |
| November 1964 | 130 | Short Fiction | Somewhere in Space | Worlds of Tomorrow, November 1964 |
| February 1965 | 80 | Short Fiction | A Flask of Fine Arcturan | Galaxy Magazine, February 1965 |
| February 1965 | 68 | Short Fiction | Gree's Commandos | If, February 1965 |
| April 1965 | 62 | Short Fiction | Gree's Hellcats | If, April 1965 |
| April 1965 | 146 | Short Fiction | Sculptor | Galaxy Magazine, April 1965 |
| June 1965 | 110 | Short Fiction | No Friend of Gree | If, June 1965 |
| September 1965 | 99 | Short Fiction | Gree's Damned Ones | If, September 1965 |
| September 1965 | 29 | Short Fiction | The Light Outside | Worlds of Tomorrow, September 1965 |
| December 1965 | 8 | Short Fiction | The Mercurymen | Galaxy Magazine, December 1965 |
| February 1966 | 6 | Short Fiction | Prisoners of the Sky | If, February 1966 |
| March 1966 | 78 | Short Fiction | Like Any World of Gree | Worlds of Tomorrow, March 1966 |
| May 1966 | 120 | Short Fiction | Trees Like Torches | Worlds of Tomorrow, May 1966 |
| September 1966 | 117 | Short Fiction | Enemies of Gree | If, September 1966 |
| November 1966 | 45 | Short Fiction | Frost Planet | Worlds of Tomorrow, November 1966 |
| November 1966 | 50 | Short Fiction | The Sign of Gree | If, November 1966 |
| January 1967 | 117 | Short Fiction | The Impersonators | If, January 1967 |
| February 1967 | 136 | Short Fiction | A Beachhead for Gree | If, February 1967 |
| June 1967 | 85 | Short Fiction | Spare That Tree | Galaxy Magazine, June 1967 |
| July 1967 | 61 | Short Fiction | A Ticket to Zenner | If, July 1967 |
| September 1967 | 7 | Short Fiction | The Fortunes of Peace | If, September 1967 |
| October 1967 | 98 | Short Fiction | Winter of the Llangs | If, October 1967 |
| November 1967 | 43 | Short Fiction | Mail Drop | If, November 1967 |
| December 1967 | 63 | Short Fiction | When Sea is Born Again | If, December 1967 |
| May 1968 | 7 | Short Fiction | Where the Subbs Go | If, May 1968 |
| July 1968 | 91 | Short Fiction | The Hides of Marrech | If, July 1968 |
| September 1968 | 43 | Short Fiction | Dream Street | If, September 1968 |
| May 1969 | 47 | Short Fiction | Mad Ship | If, May 1969 |
| November 1971 | 139 | Short Fiction | Hot World | If, November-December 1971 |
14 English-language books
| Year | Type | Title | Author(s) |
|---|---|---|---|
| 1968 | Novel | Omha Abides | C. C. MacApp |
| 1969 | Novel | Prisoners of the Sky | C. C. MacApp |
| 1969 | Novel | Secret of the Sunless World | C. C. MacApp |
| 1969 | Novel | Worlds of the Wall | C. C. MacApp |
| 1970 | Novel | Recall Not Earth | C. C. MacApp |
| 1971 | Novel | Subb | C. C. MacApp |
| 1972 | Novel | Bumsider | C. C. MacApp |
| 2007 | Chapbook | And All the Earth a Grave | C. C. MacApp |
| 2009 | Chapbook | Tulan | C. C. MacApp |
| 2014 | Collection | Somewhere in Space and Other Stories: The Best of C. C. MacApp Volume 1 | C. C. MacApp |
| 2016 | Chapbook | A Guest of Ganymede | C. C. MacApp |
| 2016 | Chapbook | The Drug | C. C. MacApp |
| 2019 | Chapbook | A Pride of Islands | C. C. MacApp |
| 2020 | Chapbook | All That Earthly Remains | C. C. MacApp |
- Gree 9
Though Wikipedia states that the author also wrote as Carroll J. Clem this is only based on one musing at 'The Fiction Mags Index' and has still to be verified.