Publications
by Bangor Welsh Manuscripts Society, Bangor, Wales, Bangor Bangor Welsh Manuscripts Society, Wales, Dept. of Pathology, George Henry Penn, British Film Institute, Astronomical Institute, University of Nottingham Dept. of Agricultural Economics, Dept. of Agricultural Economics, Radio Astronomy Institute, Cooperative Extension Service, Cornell University, Tulane University, Masarykova univerzita v Brně, University of Nottingham, Stanford University, Michigan State University,