Karl van Campen
Source: "Karl van Campen Bibliography." Author Wars, https://authorwars.com/authors/karl-van-campen.html".
Titles:
Essays
- Unknown. Letter (Astounding Stories, December 1934): Challenge
- Unknown. Letter (Astounding Stories, February 1935): And "The Irrelevant" Replies
- Unknown. Letter (Astounding Stories, March 1935): The Defense Is Ready!
- Unknown. Letter (Astounding Stories, May 1935): Mr. van Kampen Says: