Physical Agents (PTHA 1431) Instructor: Course Information PTHA 1431 Spring 2016 (94417, 94418, 94419, 94420) Syllabus PTHA 1431 Spring 2017 (18462, 18463, 18464, 18466) Syllabus PTHA 1431 Spring 2018 (61991, 61992, 61993, 61994) Syllabus