[BOSCOVICH] PROVERDIO, Edoardo.Provisional Catalogue of R.J. Boscovich Letters. Firenze: Leo S. Olschki, 1989. 1989 Signed Offprint from Annali di Storia della Scienza, Anno IV, fasc. 1, 1989. 8vo. pp. (93)-159. Green printed wrappers. Very good. Together with a typed letter signed from the author to Roger Hahn (who was very invested in the history of Boscovich’s letters). RARE.