1966. 160p. by Dean P Barton. 

This book documents the genealogy of Emma Zwahlen Barton, tracing 208 ancestors over 13 generations using a structured numbering system. Ancestors are organized by generation in reverse chronological order, with direct descendants clearly identified and supported by thorough documentation. The aim is to provide a comprehensive resource for understanding familial connections and preserving the Zwahlen lineage for future generations.