Physical properties / authors, Elisabeth Koch-Bienemann ... [et al.] ; editors, Gerhard Czack ... [et al.] ; chief editor, Gerhard Kirschstein
(Gmelin handbook of inorganic chemistry / prepared and issued by Gmelin-Institut für Anorganische Chemie der Max-Planck-Gesellschaft zur Förderung der Wissenschaften ; director, Ekkehard Fluck ; system no. 54 . W, tungsten ; suppl. v. A2)