by N. S. Chamberlin ...[et al.]. by H. T. Chapman ...[et al.]. by N. I. Bukharin ...[et al.]. by L. S. Pontryagin ...[et al.]. by A. J. Panshin ...[et al.]. by C. M. Purin ...[et al.]. by H. S. Avery ...[et al.]. by Y. S. Touloukian ...[et al.]. reported by K. A. J. Chamberlain ...[et al.]. R. L. Chambers [et al.]