Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 136 Document Number: C20797
Notes:
Burton Swanson Collection, pages 37-48 from "50 years of Hohenheim extension studies 50 Jahre Hohenheimer Landwirtschaftliche Beratungslehre" ISBN 3823613553 in English and German
Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 136 Document Number: C20796
Notes:
Burton Swanson Collection, pages 23-36 from "50 years of Hohenheim extension studies 50 Jahre Hohenheimer Landwirtschaftliche Beratungslehre" ISBN 3823613553 in English and German