El día que España derrotó a Inglaterra : de cómo Blas de Lezo, tuerto, manco y cojo, defendió el Imperio español en América / Pablo Victoria. (OCLC #941791257)

RDA 3.5.2.6 on recording the Dimensions of Map, Etc., on Folded Sheet says that if
the sheet itself contains a panel or section designed to appear on the outside when the sheet is folded, then record the dimensions of the map, etc., and add the dimensions of the sheet in folded form, preceded by a comma. This resource has such a map folded up in the back, so I have recorded its dimensions this way in the physical description:

300 __ ǂa 351 pages : ǂb color illustrations, color maps ;
    ǂc 24 cm + 1 map (91 x 63 cm, folded to 24 x 17 cm).