In the West, the liturgical books containing the presidential prayers of the liturgy are known as Sacramentaries, while in the East a similar collection of prayers are known as Euchologies. Thus, in the Western Rites, the term Sacramentary is associated with the collection of prayers for the Mass. Since the scope of this article (as well as following articles) is the Roman Missal, examination of sacramentaries are necessary to understand these antecedents of the Missal. Although there are several sacramentaries, each of which could be subject of detailed study, this article (as well as following articles) will give brief background of the major sacramentary traditions only. The following articles offers background on some sacramentaries from where the Roman Missal of 2002 has borrowed prayers that were modified according to contemporary context.
 C. Vogel, Medieval Liturgy: An Introduction to the Sources, tran. W.G. Storey and N.K. Rasmussen (Washington DC: The Pastoral Press, 1981), 64-106. See also Encyclopaedia of Early Christianity, 810; D.M. Hope, The Leonine Sacramentary: A Reassessment of its Nature and Purpose (Oxford: Oxford University Press, 1971), 16, 23; C.L. Feltoe, Sacramentarium Leonianum: Edited with Introduction, Notes and Three photographs (Cambridge: University Press, 1896), viii; H.A. Wilson, The Gregorian Sacramentary Under Charles the Great, xviff; H.A. Wilson, The Gelasian Sacramentary: Edited with Introduction, Critical Notes and Appendix (Oxford: Clarendon Press, 1894), xviii.