by Sven R. Kjellberg ...[et al.]. by David R. Koeppen ...[et al.]. by H. R. Bolliger ...[et al.]. by L. E. Grinberg ...[et al.]. by E. R. Parker ...[et al.]. by Earl R. Parker ...[et al.]. by S. C. Kang ...[et al.]. Erik T. H. Kjellstrom...[et al.]. Stanley J. Goldberg ... [et al.]. by John R. Commons ...[et al.].