by Ralph H. McKee ...[et al.]. by Randolph C. Wilhoit ...[et al.]. by Guido H. Marx ...[et al.]. by W. C. Allee ...[et al.]. Ralph Hultgren ...[et al.]. by Robert V. Pole ...[et al.]. by Robert U. Ayres ... [et al.]. by Robert F. Trapp ...[et al.]. Ralph E. McDonald...[et al.] by R. A. Grange ...[et al.]