|The World Book Encyclopedia. Chicago: Field Enterprises Educational Corporation, 1958.|
|1957 Encyclopedia Year Book. The Story of Our Time. The Grolier Society Inc.|
|Sid G. Hedges (Editor). The Universal Book of Hobbies. London: Odhams Press Limited, 1935.|
|Professor Stefan Kruckenhauser. Edited by Kurt Peter Karfeld. Snow Canvas. Ski, men and mountains with the Leica. |
Berlin: Photoking-Verlag Hellmut Elsner K.-G., 1937.
Thankfully over due in part to legislation. No one should be allowed to have this much fun.