authors, Irene Baptista de Alleluia ... [et al.] ; chief editors, Hans Karl Kugler ... [et al.] ; : gw, : us. -- Springer, 1983. -- (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. 69 . Tc, Technetium ; suppl. v. 2).