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Keppel, Arnold Joost van

(Encyclopedia)Keppel, Arnold Joost van: see Albemarle, Arnold Joost van Keppel, 1st earl of. ...

Helst, Bartholomeus van der

(Encyclopedia)Helst, Bartholomeus van der bärˌtōlōmāˈəs vän dər hĕlst [key], 1613–70, Dutch portrait painter. In Amsterdam the wealthy citizens preferred his flattering, tasteful portraits to those of R...

Van Vleck, John Hasbrouck

(Encyclopedia)Van Vleck, John Hasbrouck, 1899–1980, American physicist, b. Middletown, Conn., Ph.D. Harvard, 1922. As a professor at Harvard, Van Vleck developed fundamental theories on the quantum mechanics of m...

Oldenbarneveldt, Johan van

(Encyclopedia)Oldenbarneveldt, Johan van yōhänˈ vän ôlˌdənbärˈnəvĕlt [key], 1547–1619, Dutch statesman. He aided William the Silent in the struggle for Dutch independence from Spain and opposed the dic...

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