. . "1900 - 1999" . . . . "Encyclopedia of world biography : 20th century supplement : an international reference work in sixteen volumes, including a supplement of four volumes on people of the 20th century" . "Encyclopedia of world biography 20th century supplement"@en . "Biography" . . . . . "Encyclopedia of world biography : 20th century supplement"@en . "Encyclopedia of world biography : 20th century supplement" . . . . . .