"Articles ... published in the North American edition of Communio since its inception in 1974"--Introduction.
v. 1. The unity of the church.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Joseph Ratzinger in Communio. ISBN 9780802864161. Published by William B. Eerdmans Pub. Co. in 2010. Publication and catalogue information, links to buy online and reader comments.
