Probability

From Author Wars - https://authorwars.com/books/probability-59444.html

Overview:

Unknown. If, April 1954 (Unknown, Louis Trimble, Quinn Publishing Company, Inc.; Buffalo, NY, $0.35, 124 pages, digest, MAGAZINE)
2010 . Probability (2010, Louis Trimble, Project Gutenberg, ebook, Chapter Book)
2016 . Fantastic Stories Presents the Worlds of If Super Pack #1 (2016, Louis Trimble, Positronic Publishing, ISBN-10: 9781515411543, $16.99, 516 pages, Trade Paperback, Anthology)
2016 . Fantastic Stories Presents the Worlds of If Super Pack #1 (2016, Louis Trimble, Positronic Publishing, ISBN-10: 9781515411482, $1.99, ebook, Anthology)
2018 . Fantastic Stories Presents the Worlds of If Super Pack #1 (2018, Louis Trimble, A & D Publishing, ISBN-10: 9781515420897, $24.99, 516 pages, Hardcover, Anthology)