. . "Bull, John, Research Assistant, Department of Ornithology, American Museum of Natural History" . . "John"@en . "JOHN" . . "L."@en . "Bull, John L. Ornithologe, USA" . "BULL" . . "1964" . "Bull"@en . "Ornithologe, USA John L Bull" . "Research Assistant, Department of Ornithology, American Museum of Natural History John Bull" . . "Ornithologe John L. Bull" . "BULL, John, of the Department of Ornithology, American Museum of Natural History" . "Ornithologe, USA John L. Bull" . "Bull, John L Ornithologe, USA" . . "John L Bull"@en-CA . "JOHN BULL" . "John Stanley Bull" . "John Bull" . "Bull, John L. Ornithologe" . "John L." . "of the Department of Ornithology, American Museum of Natural History John BULL" . . "John Stanley" . "John Bull"@fr-FR . . "John L. Bull" . "John L. Bull"@en . . "L" .