German Maksimov / Herman Maximov - Russian author
| English title | Russian title | translator | published | format | publisher | ISBN |
| The Ultimate Threshold ( story in The Ultimate Threshold and Worlds Spring ) | Posledniy Porog ( Последний порог ) | Ginsburg, Mirra then DeGaris, Roger | ( 1965 ) 1970 / 78, 1981 | h/b / p/b, h/b | Holt, Rinehart and Winston / Penguin, MacMillan Publishing Company | 0030818478 / 9780030818479 / 0140048731 / 9780140048735 & 0025421808 / 9780025421806 |