Wild heards of cattle lived in both north and east texas true or false

What impact did indian schools have on native americans ?

Which south american patriot of lrish descent became the leader of newly independent chile

The rise of advertising in the 1920s. i am good with seeing how advertisements shape the roaring twenties and how it developed a new way of life through modern days. but i am not sure what the details of advertising in the 1920s were. if possible can you send me links (preferrably credential links) to sources that maybe show like the first company to start advertising through the radio, how advertising benefits (statistics graphs), etc.