Robert H. Frank ... [et al. Robert J. Chaskin ... [et al.] Robert J. Clerman ... [et al.] Robert D.Cook ... [et al. Robert H. Frank ... Robert Kegan ... [et al. Robert A. Divine ... [et al.] Robert B. Donald ... [et al.] Robert C. Meier ... [et al.] Robert D. Cook ... [et al.].