London, Warsaw: Macmillan / Polish Scientific Publishers / Johnson Reprint Corp. 1972. First edition thus. Hardcover. Quarto, tan cloth with pictorial paper inset on front board, spine title in black with gilt ornament; (xi), 25,  pp., unpaginated facsimile approx. 400 pp. Fine / very good. Item #21630
Volume I of the Polish Academy of Science "Nicholas Copernicus Complete Works." With introduction and detailed notes on the manuscript. Nicholas Copernicus' "De Revolutionibus" is considered to be the foundational text of modern astronomy.