"Thomas Jefferson's rough draft is the core document for an exploration of the antecedents to some critical phrases and concepts in the Declaration of Independence. This critical document combines Jefferson's first draft and changes made by the congressional committee appointed to draft a declaration and then by the entire Congress."

The Research Methods Knowledge Base is a comprehensive web-based textbook that addresses all of the topics in a typical introductory undergraduate or graduate course in social research methods. It covers the entire research process including: formulating research questions; sampling (probability and nonprobability); measurement (surveys, scaling, qualitative, unobtrusive); research design (experimental and quasi-experimental); data analysis; and, writing the research paper.