How did discrimination against african americans in the north differ from discrimination in the south?

About how many european immigrants were processed at the facilities on ellis island

Which of these is not a criticism of the concentric zone model? it does not accurately describe cities after the rise of suburban development. it only applies to cities that grew after the development of the automobile. it assumes that inner-city areas will always be repurposed instead of abandoned. it places too much importance on the traditional central business district.

What river systems the worlds earliest known civilization develop ?