 | This is a non-diffusing subcategory of Category:20th-century American scientists. It includes American scientists that can also be found in the parent category, or in diffusing subcategories of the parent. |
American women active in the 20th century.
| This is a non-diffusing subcategory of Category:20th-century American scientists. It includes American scientists that can also be found in the parent category, or in diffusing subcategories of the parent. |
American women active in the 20th century.