Courses marked with an asterisk (*) are half courses. Topics courses differ in content from year to year and, under different descriptions, may be taken a second time for credit. A topics course may not be taken for credit by a student who has already received credit for the same topic under a course listed in a previous calendar. Candidates should consult the Chair for the specific offerings in a given year. 600-level courses, which are also available to senior undergraduate students at the 400-level, may be offered for graduate credit. Graduate students will be required to complete extra work as detailed in the course outline in addition to that required of undergraduate students.