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The American Institute of Architects Archives
Membership file contains membership application; correspondence regarding service on the AIA Board of Directors (he served a three-year term 1926/27-1928/29); correspondence regarding resignation and financial problems.
The 1917 AIA membership directory lists him as Dalton J. von Schneider, as shown on his membership application from 1916. The next published AIA membership directory, in 1919, lists him as Dalton J. V. Snyder.
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