by Robert U. Ayres ... [et al.]. by Robert K. Brayton ... [et al.]. by Robert M. Jarvis ... [et al.] by Robert M. Johnston ... [et al.]. by Elbert C. Herrick ... [et al.]. Robert P. Wagner ... [et al.]. by Judith C. Harris ... [et al.]. by Jose L. Bravo ... [et al.]. Robert N. Bellah ... [et al.]. Arthur P. Boresi ... [et al.].