Edition statement from preface. English translation prepared by Henry J. White. -- Introduction. "This volume is based on [the author's] "Das Marsprojekt," a special issue of the magazine "Weltraumfahrt," c.1952 by by Bechtle Verlag, Esslingen, Germany. A clothbound ed. was published by the Univ. of Illinois Press in 1953." -- T.p. verso.