A.F.W. Coulson and P. W. Harrison. J.M. Coulson and J.F. Richardson. J.M. coulson an d J.F. richardson. by J.M. Coulson and J.F. Richardson. by E. A. Coulson and E. F. G. Herington. by F. A. Benson and D. Harrison. [by] A. Nelson and K. D. Nelson. A.J.T. Davie and R. Morrison. Kurt I. Jacobson and Ralph E. Jacobson. S. G. Lipson and H. Lipson.