Papers, 1924-1976.
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Menzel, Donald H. (Donald Howard,), 1901-1976.
http://n2t.net/ark:/99166/w6jq12dm (person)
Menzel died in 1976. From the description of Autobiography, 1974. (Unknown). WorldCat record id: 80630339 Donald Howard Menzel was an astrophysicist. From the description of Papers concerning UFOs, 1952-1976. (American Philosophical Society Library). WorldCat record id: 122523365 From the description of Autobiography, September 1974. (American Philosophical Society Library). WorldCat record id: 122624215 From the guide to the Papers concerning U...