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Journal of Experimental Psychology. Animal Behavior Processes|January 1, 1989
Timing light and tone signals in pigeonsW A Roberts, K Cheng, J S Cohen
Journal of the Experimental Analysis of Behavior|November 1, 1989
Timing multimodal events in pigeonsK Cheng, W A Roberts
Journal of Experimental Psychology. Animal Behavior Processes|July 1, 1980
Distribution of trials and intertrial retention in delayed matching to sample with pigeonsW A Roberts
Journal of Experimental Psychology. Animal Behavior Processes|January 1, 1995
Further evidence for hierarchical chunking in rat spatial memoryT Macuda, W A Roberts
Journal of Comparative Psychology (Washington, D.C. : 1983)|July 13, 2000
Summation of symbols by pigeons (Columba livia): the importance of number and mass of reward itemsA Olthof, W A Roberts
Journal of Clinical Rheumatology : Practical Reports on Rheumatic & Musculoskeletal Diseases|December 17, 2008
Clinical and laboratory improvement in ankylosing spondylitis after treatment with etanercept: a case reportJ S Cohen
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