by L. S. Pontryagin ...[et al.]. by A. J. Panshin ...[et al.]. by C. M. Purin ...[et al.]. by V. K. Zworykin ...[et al.]. by Y. S. Touloukian ...[et al.]. by N. S. Chamberlin ...[et al.]. by H. S. Avery ...[et al.]. by N. I. Bukharin ...[et al.]. by S. W. Pearson ..[et al.]. by C. L. Stewart ...[et al.].