Johannes Kepler Gesammelte Werke, Band XIII, Briefe 1590-1599
Munchen: C. H. Beck'Sche Verlag, 1945. First printing. Paperback. Quarto, wraps, 432 pp, text of the letters mainly in Latin. Pages uncut and unopened. Light wear and tanning, still very good, minor soil and wear to covers, gentle creasing to lower corners of pages throughout.