Washington DC: Government Printing Office, 1945. First Edition. First published edition of this Twentieth Century milestone, following a tiny mimeographed issue that appeared a few weeks earlier for advance distribution to the press and the scientific community. Includes a foreword by General Leslie Groves, Director of the Manhattan Project. Generally regarded as the first publicly-issued work on the subject of nuclear warfare, described by Carter and Muir as a "remarkably full and candid account of the development work carried out between 1940 and 1945 ... which culminated in the production of the first atomic bomb (PMM 422e). Octavo. Publisher's printed wrappers; vii, 182pp. Ink ownership signature ("David Caliri") to front wrapper; corners bumped, with minor external wear; still a tight, Very Good to Near Fine copy.