¿que lazos culturales poseemos los argentinos?

By the late 1700s the best place to find a water frame and a spinning mule was in

During world war 2 mexican workers came to the united states as part of the

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.