- Series: Letters: John W. Campbell, Jr. Series Record # 47306
- Letters: John W. Campbell, Jr.
- Letter (Science Wonder Stories, July 1929): Questions Infinite Speed (1929) [ES] by John W. Campbell, Jr.
- Letter (Amazing Stories, March 1930): An Editorial Objected to, Taking Acceleration in a Bath Tub (1930) [ES] by John W. Campbell, Jr.
- Letter (Amazing Stories, May 1930) (1930) [ES] by John W. Campbell, Jr.
- Letter (Amazing, September 1930): Some Remarks on the "Skylark Three" and About Errors. A Compliment to Dr. Smith's Stories (1930) [ES] by John W. Campbell, Jr.
- Letter: Some Remarks on the "Skylark Three" and About Errors. A Compliment to Dr. Smith's Stories. (1930) [ES] by John W. Campbell, Jr.
- Letter (Amazing Stories, November 1930): "The Campbells Are Coming" in the Words of the Old Scotch Song (1930) [ES] by John W. Campbell, Jr.
- Letter (Amazing, February 1931): An Author on the War Path (1931) [ES] by John W. Campbell, Jr.
- Letter (Amazing Stories, March 1931) (1931) [ES] by John W. Campbell, Jr.
- Letter (Amazing Stories, May 1931) (1931) [ES] by John W. Campbell, Jr.
- Letter (Amazing Stories, May 1933) (1933) [ES] by John W. Campbell, Jr.
- Letter (Astounding Stories, December 1934) (1934) [ES] by John W. Campbell, Jr. [only as by Karl van Campen]
- Letter (Astounding Stories, February 1935) (1935) [ES] by John W. Campbell, Jr. [only as by Karl van Campen]
- Letter (Astounding Stories, March 1935) (1935) [ES] by John W. Campbell, Jr. [only as by Karl van Campen]
- Letter (Astounding Stories, May 1935) (1935) [ES] by John W. Campbell, Jr. [only as by Karl van Campen]
- Letter (Astounding Stories, July 1935) (1935) [ES] by John W. Campbell, Jr. [only as by Karl van Kampen]
- Letter (Astounding Stories, January 1937) (1937) [ES] by John W. Campbell, Jr.
- Letter (Astounding Stories, June 1937) (1937) [ES] by John W. Campbell, Jr.
- Letters (Astounding Stories, July 1937) (1937) [ES] by John W. Campbell, Jr.
- Letter (Amazing Stories, August 1937) (1937) [ES] by John W. Campbell, Jr.
- Letter (Astounding Stories, September 1937) (1937) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Astounding Stories, November 1937) (1937) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Astounding Stories, November 1937) (1937) [ES] by John W. Campbell, Jr.
- Letter (Astounding Stories, January 1938) (1938) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Astounding, March 1938) (1938) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Astounding, April 1938) (1938) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Astounding, July 1938) (1938) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Astounding, December 1938) (1938) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Astounding, August 1939) (1939) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Astounding, November 1939) (1939) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Astounding, January 1940) (1940) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Spaceways, January 1940) (1940) [ES] by John W. Campbell, Jr.
- Letter (Astounding, March 1940) (1940) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Astounding, May 1940) (1940) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Astounding August 1940) (1940) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Astounding, October 1940) (1940) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter (Astounding, April 1941) (1941) [ES] by John W. Campbell, Jr. [only as by Arthur McCann]
- Letter From The Editor (A Requiem for Astounding) (1964) [ES] by John W. Campbell, Jr. [only as by John W. Campbell]
- Letter (Riverside Quarterly, June 1970) (1970) [ES] by John W. Campbell, Jr. [only as by John W. Campbell]
- Letter (John W. Campbell: An Australian Tribute): To Ronald E. Graham (8 Sept., 1969) (1974) [ES] by John W. Campbell, Jr. [only as by John W. Campbell]
- Letter (John W. Campbell: An Australian Tribute): To Jack Wodhams (28 June, 1971) (1974) [ES] by John W. Campbell, Jr.