Statistical Information Research Guide 

'The Gallup Brain is a searchable, living record of more than 70 years of public opinion. Inside, you'll find answers to hundreds of thousands of questions, and responses from millions of people interviewed by The Gallup Poll since 1935.'

Access to very large computer data files in the social sciences, including election results, polls, surveys, and census information.

'The Pew Global Attitudes Project is a series of worldwide public opinion surveys that encompasses a broad array of subjects ranging from people's assessments of their own lives to their views about the current state of the world and important issues...'

Full-text. A compilation of more than 14,000 surveys conducted by more than 700 polling organizations in the United States and more than 80 other countries.