Kier, U. H. (1991). Footprints (600 Exemplare.). pig & palmtree press.
Lua i Stíl Chicago (17ú heag.)Kier, Udo; Hein. Footprints. 600 Exemplare. New York [u.a.]: pig & palmtree press, 1991.
Lua MLA (8ú heag.)Kier, Udo; Hein. Footprints. 600 Exemplare. pig & palmtree press, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.