ARL Dr. Stuart E. Marsh, Chair, Arid Lands Resource Sciences GIDP, OALS 205B, 621-8574 Below are ARL courses offered this term, select a course for more info. All - ARL Courses ALL - Printer friendly .pdf format (pdfs do not include seat availability, prerequisites, or special fee information). Adobe Acrobat reader required. ARL 418 - SOUTHWEST LAND+SOCIETY ARL 512 - ECON PLCY DEV COUNTRIES ARL 518 - SOUTHWEST LAND+SOCIETY ARL 550 - GEOMORPHOLOGY ARL 590 - REMOTE SENS PLANET EARTH ARL 595A - CURRENT RESEARCH ARL 599 - INDEPENDENT STUDY ARL 619 - ECOL/SAVNNS,SHRBLND+WDLN ARL 631 - ANTHROPOLOGY+DEVELOPMENT ARL 642 - USE+MGMT OF ARID LANDS ARL 699 - INDEPENDENT STUDY ARL 900 - RESEARCH ARL 920 - DISSERTATION ARL 930 - SUPPLEMENTARY REG