Accessing the arguments of lobby groups How/where does one get hold of the arguments put forward by lobby groups?

I am currently researching the topic of advertising as it relates to junk food. There are many arguments in favour of regulation/ban in books, papers and websites; however, I am looking for responses to these arguments by the industry. I keep coming across articles claiming that lots of money has been spent lobbying against regulation, but these are almost never referenced. Where should I look for the arguments of lobby groups? This seems like the only place to find the other side of the debate.

This is an area that is quite alien to me so any guidance is appreciated. Also, I'm interested in lobbying in any English-speaking country.
Lobby groups like having their arguments known. They publish them on their web sites, often as media releases. If you can't find what you want there, call them: lobby group representatives will be happy to explain their positions.

My husband works for a lobby goup/peak body and he quite enjoys talking to students who contact him with questions about his industry.