What is one way that historians can establish the authenticity of a primary source

What does the quote describe? “the closeness of the place, and the heat of the climate, added to the number in the ship, which was so crowded that each had scarcely room to turn himself, almost suffocated us….the shrieks of the women, and the groans of the dying, rendered the whole a scene of horror almost inconceivable.”

What types of modernization did atatürk introduce? give examples.

What were some of the new consumer appliances that americans could purchase in the 1920s