The Soviet Union is a huge country that covers one sixth of the world's land area. It contains 8,650,000 square miles compared to 3,567,000 square miles in the United States.
"Forests of the SovietUnion,"
Ames Forester: Vol. 69
, Article 12.
Available at: https://lib.dr.iastate.edu/amesforester/vol69/iss1/12