Books selected for the  NAB Heritage Collection have one or more of the following attributes:  German Baptist history, beliefs, practices; cataloged in the seminary library in Rochester, NY and containing the library imprint or seal; owned and autographed by prominent German Baptist pastors and leaders or written by NAB authors.  Books date from 1711 to the present.  Some recent acquisitions tell of the experiences of the Baptists who were Germans from Russia and suffered persecution and other hardships.  These books are cataloged and appear in the OCLC catalog of holdings throughout the world.  In some cases we have one of only 3-4 known to exist.  You need to know an author or title to locate these books which are organized by the  Library of Congress classification system.