Gerhard Herzberg Autograph

Autograph manuscript signed, three pages, 8,25 x 10,75 inch, 14.06.1984, with scientific content - entitled "Rowland Gratings, Molecular Hydrogen, (and Space Astronomy)", and include Herzberg`s introduction, notes on Molecular Oxygen, Molecular Hydrogen and Applications in Astronomy, written in blue ink & signed and inscribed in black ink "Mit den besten Grüßen - Ihr Gerhard Herzberger - April 1987" - with numerous pencil annotations in the left margin relating to the slide presentations, stapled to the upper left corner - in nearly very fine condition. Accompanied by the corresponding typed letter signed, one page, 8,5 x 11 inch, on the printed stationery of the Herzberg Institute of Astrophysics at the National Research Council of Canada, Ottawa, 24.04.1987, reply letter to Wolfgang Windhausen - concerning the request of an autograph manuscript, signed in dark ink "Gerhard Herzberger", in very fine condition.