Thompson, Craig B., M.D., Assistant Investigator 445 
University of Michigan Medical School 
Molecular Aspects of Differentiation and Proliferation of the Lymphoid System 
Tonegawa, Susumu, Ph.D., Investigator 449 
Massachusetts Institute of Technology 
Development ofyb T Cells 
Weiss, Arthur, M.D., Ph.D., Associate Investigator 453 
University of California at San Francisco 
Structure and Function of the T Cell Antigen Receptor 
Wltte, Owen N., M.D., Investigator 457 
University of California at Los Angeles 
Normal and Abnormal Lymphocyte Growth Regulation 
347 
