Why was the league of nations not very effective in maintaining peace

What must happen for new french words to be published in official dictionaries? a. they must be approved by the french academy b. they must be voted on by the people of france c. they must be used by famous french writers d. they must be used by philosophers a. they must be approved by the french academy

In which horizon of soil profile is prevent material usually found

Most tornadoes carry winds speeds in a range of km per hour