Explanation:
Textbooks
Literature reviews and review articles (e.g., movie reviews, book reviews
Biographical works
Reference books, including dictionaries, encyclopedias, and atlases
History books and other popular or scholarly books
Commentaries and treatises
They devided it into four zones, one for the US, one for USSR, one for France and one for Great Britain.
D) European increased need for raw materials and specialized metals in order
