2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/75025Elementary arguments that rely on previous results obtained by G. Ringel and B. Jackson are given to establish Ringel's generalized earth-moon problem for Dyck's surface and the Moebius band.4 pages, 1 figure. Revised 6/23/2005Combinatoricstext