Woodbridge, UK; Rochester, NY: Boydell Press, 2006, ISBN 978-1-84383-205-8 . Markey, TL, A Tale of the Two Helmets: Negau A and B, Journal of Indo-European
小亞瑟·霍恩布婁(英语:Arthur Hornblow Jr.) (1936–1942;离婚) John Hertz, Jr. (1942–1944;离婚) 傑納·馬基(英语:Gene Markey) (1946–1950;离婚) 霍蘭德·H·薩爾吉特(英语:Howland H. Sargeant) (1951–1960;离婚)