by A. Tolstoy ...[et al.]. by A. Tolstoy …[et al.]. by A. Fletcher ...[et al.]. by A. Hasz ...[et al.]. by A. T. Dover ...[et al.]. by A. Dryland ...[et al.]. by V. Dobrovolsky ...[et al.]. by F. A. Bovey ...[et al.]. by A. J. Panshin ...[et al.]. by A.R. Meetham ... [et al.].