by Homer A. Watt,...[et al.] by Homer A. Watt,...[et al. by G. L. Bach,...[et al.] by Noel W. Schutz,...[et al.] by Lola Brown,...[et al.] by G. L. Bach,...[et al. by Noel W. Schutz,...[et al. by Arthur C. Clarke,...[et al.] by Adrian L. Hull,...[et al.] by Lola Brown,...[et al.