Hourdry, M. (1968). Mots croises gradues. Didier.
Lua i Stíl Chicago (17ú heag.)Hourdry, Michel. Mots Croises Gradues. Paris: Didier, 1968.
Lua MLA (9ú heag.)Hourdry, Michel. Mots Croises Gradues. Didier, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.