2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/201662Using the methods of Kang et al. and recent results on the characters of Kirillov-Reshetikhin modules by Nakajima and Hernandez, the existence of Kirillov-Reshetikhin crystals B^{r,s} is established for all nonexceptional affine types. We also prove that the crystals B^{r,s} of type B_n^{(1)}, D_n^{(1)}, and A_{2n-1}^{(2)} are isomorphic to recently constructed combinatorial crystals for r not a spin node.23 pages; version that appeared in Representation Theory and erratum addedQuantum AlgebraRepresentation Theory81R50, 81R10, 17B37text