by V. Dobrovolsky ...[et al.]. by A. Tolstoy ...[et al.]. by C. L. Godske ...[et al.]. by F. A. Bovey ...[et al.]. by G. Woolfe ...[et al.]. by H. A. Liebhafsky ...[et al.]. by F. A. Holland ...[et al.]. by A. Dryland ...[et al.]. by A. T. Dover ...[et al.]. by D. Boon ...[et al.].