[by] G. E. Mueller and E. R. Spangler. by M. W. Porter and R. C. Spiller. by A. E. Gillam and E. S. Stern. by W. R. Schoeller and A. R. Powell. by George P. Meade and G. L. Spencer. by J. E. Gowan and T. S. Wheeler. [by] H. W. Fowler and F. G. Fowler. by A. R. Bailey and L. E. Samuels. by P. E. Conner and E. E. Floyd. by G. E. Williams and B. J. Prigmore.