found: His Staatliches und internationales Luftverkehrsrecht der sozialistischen Staaten UdSSR, DDR, Polen, CSSR, Ungarn, Bulgarien, Rumänien, Kuba, Jugoslawien und der VR China, 1980:t.p. (Dr. Dr. J.L. Kneifel)
found: LC data base, 7/13/83(hdg.: Kneifel, John L.; variant: Kneifel)
found: Die Kosten im Luftverkehr, 1966:t.p. (Johannes Kneifel)
found: Email from author, May 2, 2016(Johannes Kneifel prefers to use German form of name in authorized access point; works have been published under names Johannes and John; lives in Munich)
found: Romania's rocky road from the Ceaușescu dictatorship to fragile democracy, 2023:verso of title page (Johannes Kneifel , born 1939)