The first page of the second Pocket printing of R.U.R. says: "A reader's supplement has been added to the text and includes biographical and historical background, features of the author's style, character analysis, and critical excerpts. The material was prepared by an editorial committee directed by Harry Shefter, professor of English, New York university."
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| May 1969 |
|
R. U. R. | Washington Square Press | Chapbook | |
| October 1973 |
|
R. U. R. | Pocket Books | Chapbook |