Increasingly, political scientists use the term 'experiment' or 'experimental' to describe their empirical research. One of the primary reasons for doing so is the advantage of experiments in establishing causal inferences. In this book, Rebecca B. Morton and Kenneth C. Williams discuss in detail ho[...]

The premier reference on obstetrics practice for nearly a century, the new Twenty-Second Edition is the ideal text for anyone who provides maternal and fetal health care. Now offering state-of-the-art diagnostic ultrasound images throughout, "Williams Obstetrics" maintains its strong, evidence-based[...]