Chapuis, Alfred. Automates. Machines Automatiques et Machinisme (Geneva: Publications Techniques, 1928) 1928
Collection of publications from the library of Dr. Ludwig Koch consisting of: BBC Natural History Recordings (London: BBC, 1961) Berry, M.F. and Brock, D.W.E. Hunting by Ear (London: H.F. & G. Witherby, 1937). Chapuis, Alfred. Automates. Machines Automatiques et Machinisme (Geneva: Publications Techniques, 1928) Clark, Ronald W. The Huxleys (London: Heinemann, 1968) Delamain, Jacques. Portraits D’Oiseaux (Paris: Editions Stock, 1938) Delépinne, Berthe. Elizabeth. Reine des Belges (Brussels: Willy Godenne, 1954) Holder, Artur. Leonard Bernstein (Berlin: Rembrandt, 1961) Howard, Len. Birds as Individuals (London: Collins, 1952) Huxley, Julian. At the Zoo (Woking: Unwin, 1936) Leakey, J.H. School Errant (London: Dulwich College Preparatory School, 1951) MacDonald, Malcolm. The Birds of Brewery Creek (London: Oxford University Press, 1947) Michaelberten, Walter. Musik und Mikrophon (Dusseldorf: Schwann, 1951) Radio and Television Who’s Who, 1950-1951 (London: Vox Mundi, 1950) Raphaël, Samson. Pour Poser un Diagnostic (Brussels: Meddens, [no date]) Reiss, Curt. Knaurs Weltgeschichte der Schallplatte (Zurich: Droemersche, 1966) Seton-Thompson, Ernest. Wild Animals I Have Known (London: David Nutt, 1901) Silberman, Fred. Jungles and Skyscrapers (London: [no publisher], 1940) Stern-Rubarth, Edgar. Drei Männer suchen Europa (Munich: Willi Weismann, 1947) Tiessen, Heinz. Musik der Natur (Freiburg: Atlantis, 1953) Collection of publications from the library of Dr. Ludwig Koch