Reference Materials Watch our video on the Siegel Effect to test for Vegetable Tanned LeatherWatch our video on the Ewald Effect- for Oil Tanned LeathersLeather for Libraries recommendations for choosing the best leathers for bookbinding, per British Publication, approximately 1905Betty Haines re: Archival Bookbinding LeatherGenuine Morocco published in Guild of Bookworkers. Author Steven Siegel Sample Sulfur Free Calf“The Romance of Leather”, published 1937, by Tanners’ Council of America – This document contains a wealth of information on the “basics” of leatherReport of the Committee on Leather for Bookbinding, Royal Sociey of Arts (Great Britain), London, 1905 – please use Adobe Acrobat to openAffidavits for Archival Native Tanned Sokoto Leather From 3 museum experts in Sokoto, NigeriaNative Tanned -Colored Archival Sokoto Leather