. . "Electronic books"@en . . . . . . . . "Presents stories of remarkable men and women who have produced inventions that made major contributions to a wide range of fields." . . . . "African-American inventors" . "African-American inventors"@en . "Biography"@en . "Biography" . "Juvenile works"@en . "Juvenile works" . . . . . . "JUVENILE NONFICTION Technology General." . . "JUVENILE NONFICTION Biography & Autobiography General." . .