Link to FamilySearch catalog entry for Ahnenstamkartei: Ahnenstammkartei Part I [Index] .  This collection contains genealogies for Central Europe.  See article on how to use this collection in the German Genealogical Digest.   A free FamilySearch account is needed to access the collection.

Link to FamilySearch catalog entry for Ahnenstammkartei Part II [Numerical Listing of Pedigees]

See also Mappenstucke at this link: https://www.familysearch.org/en/search/catalog/706307   [Restricted to FamilySearch centers].