Large Catechism (Part 15) Of the Sacrament of the Altar
Link: http://www.projectwittenberg.org/pub/resources/text/wittenberg/luther/catechism/web/cat-14.html
Link
Link: http://www.projectwittenberg.org/pub/resources/text/wittenberg/luther/catechism/web/cat-14.html
Link
by Dane Carlson