"1997-05-23Z"^^ . "David McWilliams Ludlum"@en . . . . . . . "Ludlum, David M."@en . . . "1910Z"^^ . "David McWilliams Ludlum (December 3, 1910 \u2013 May 23, 1997) was an American historian, meteorologist, entrepreneur, and author. He was the founder of the only magazine in the U.S. about weather, Weatherwise."@en . "1910-12-03Z"^^ . "American meteorologist, historian" . . . . . "1997Z"^^ .