The Publications is made up of components including this S/m Kdx50a which is the most expensive.
Parts such as the Publications: Fiche-kdx50-a1, A&p Klx50-a1, O/m Kdx50-a2, S/m Kdx50a are included in the Kdx50-a2 Kdx50 2004 Usa Canada Publications parts fiche.