This is a non-diffusing subcategory of Category:1940 non-fiction books.
It includes 1940 non-fiction books that can also be found in the parent category, or in diffusing subcategories of the parent.
It includes 1940 non-fiction books that can also be found in the parent category, or in diffusing subcategories of the parent.
This category is for English-language non-fiction books written or published in the 1940s.
Subcategories
This category has the following 10 subcategories, out of 10 total.