Mandatum unitatis : Beiträge zur Ökumene - Willebrands, Johannes <cardinale ; 1909-2006>. (OLS)http://semarc/name/30541 (Bonifatius,, 1989)
Fondo Card. C.M. Martini.
Keywords: Ecumenismo. (OLS)http://semarc/subject/3071