by Ridgway M. Hall, Jr ... .[et al.]. by John L. Colley, Jr ... [et al.] by John D. Walker ... [et al.] by Judith C. Harris ... [et al.]. by Richard M. Bozorth ... [et al.]. by William Z. Foster ... [et al.]. by Harold E. Helms ... [et al.]. by Arthur M. Master ...[et al.]. by Arthur R. Tarrer ... [et al.]. by Eduard Hala ...[et al.].