found:Steinar J. Lúðvíksson. Fimmtíu flogin ár, 1989-1990:v. 2, p. 263 (Flugfélag Íslands [no publs. in LC data base] and Loftleiðir merged on 08-01-73 to form Flugleiðir [no publs. in LC data base], which on 10-01-79 finally & formally assumed control of all operations of its two founding airlines. Its name was changed to Icelandair)