University of Minnesota. Department of PsychiatryYokel, Robert A.Pickens, Roy2013-06-242013-06-241973-03-30https://hdl.handle.net/11299/151672en-USChanges in Activity and Drug, Food, and Water Intake in 24Hr/Day d- and l- Amphetamine and Methylamphetamine Self-Administration by RatsWorking Paper