When congress passes a law, in which publication can it be found?

How did france social divisions on the late 1700s contribute to the french revolution

What roles does climate change and natural resources play in global politics?

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.