The Constitution and Its Amendments by 
The Essential Feminist Reader by Introduction to the abortion debate by BBC and An Ethics Guide to Abortion - An introduction to the abortion debate, setting out the major questions involved in the matter of terminating a pregnancy. Works hard to maintain unbiased tone throughout and provides multiple sides to the debate. Raises interesting questions about morals, ethics, laws.
Should Abortion Be Legal? - The website ProCon tries to show both the pros and cons of a particular issue.
Abortion Research Package - Pew Research offers results from new public online surveys, a slideshow on how opinion differs among various demographic groups, a discussion of the legal issues and a summary of religious groups’ positions.
How Birth Control and Abortion Became Politicize - NPR's Fresh Air looks at the history of birth control and abortion in the United States.
Use NoodleTools to keep track of your resources. You will be need to be creative with your search terms. If you are finding too few results, think of synonyms or related terms. If you are finding too many results, think of how you might add or take away words to limit your results. Remember to take the time to read what you're referencing and to think about what you're reading: does it seem plausible; does it seem well researched; what are some examples of faked discoveries throughout history and how did those shape our current thinking?