[by] P. Marmier [and] E. Sheldon. [by] Pierre Marmier [and] Eric Sheldon. by J.-P. Mathieu and G. Ourisson. by K.B. Mather and P. Swan. by W. G. McLean and E. W. Nelson. by A. G. Martin and F. W. Stephenson. by R.E. Kaiser and E. Oelrich. by P. E. Conner and E. E. Floyd. by A. B. Glanvill and E. N. Denton. by J. G. Defares and I. N. Sneddon.